diff --git a/app/controllers/admin/accounts_controller.rb b/app/controllers/admin/accounts_controller.rb
index 68b6352f8..7b1783542 100644
--- a/app/controllers/admin/accounts_controller.rb
+++ b/app/controllers/admin/accounts_controller.rb
@@ -109,21 +109,7 @@ module Admin
     end
 
     def filter_params
-      params.permit(
-        :local,
-        :remote,
-        :by_domain,
-        :active,
-        :pending,
-        :disabled,
-        :silenced,
-        :suspended,
-        :username,
-        :display_name,
-        :email,
-        :ip,
-        :staff
-      )
+      params.slice(*AccountFilter::KEYS).permit(*AccountFilter::KEYS)
     end
   end
 end
diff --git a/app/controllers/admin/custom_emojis_controller.rb b/app/controllers/admin/custom_emojis_controller.rb
index a446465c9..efa8f2950 100644
--- a/app/controllers/admin/custom_emojis_controller.rb
+++ b/app/controllers/admin/custom_emojis_controller.rb
@@ -48,7 +48,7 @@ module Admin
     end
 
     def filter_params
-      params.slice(:local, :remote, :by_domain, :shortcode, :page).permit(:local, :remote, :by_domain, :shortcode, :page)
+      params.slice(:page, *CustomEmojiFilter::KEYS).permit(:page, *CustomEmojiFilter::KEYS)
     end
 
     def action_from_button
diff --git a/app/controllers/admin/instances_controller.rb b/app/controllers/admin/instances_controller.rb
index b47b18f8e..2fc041207 100644
--- a/app/controllers/admin/instances_controller.rb
+++ b/app/controllers/admin/instances_controller.rb
@@ -62,7 +62,7 @@ module Admin
     end
 
     def filter_params
-      params.permit(:limited, :by_domain)
+      params.slice(*InstanceFilter::KEYS).permit(*InstanceFilter::KEYS)
     end
   end
 end
diff --git a/app/controllers/admin/invites_controller.rb b/app/controllers/admin/invites_controller.rb
index 44a8eec77..dabfe9765 100644
--- a/app/controllers/admin/invites_controller.rb
+++ b/app/controllers/admin/invites_controller.rb
@@ -47,7 +47,7 @@ module Admin
     end
 
     def filter_params
-      params.permit(:available, :expired)
+      params.slice(*InviteFilter::KEYS).permit(*InviteFilter::KEYS)
     end
   end
 end
diff --git a/app/controllers/admin/reports_controller.rb b/app/controllers/admin/reports_controller.rb
index 09ce1761c..7c831b3d4 100644
--- a/app/controllers/admin/reports_controller.rb
+++ b/app/controllers/admin/reports_controller.rb
@@ -52,12 +52,7 @@ module Admin
     end
 
     def filter_params
-      params.permit(
-        :account_id,
-        :resolved,
-        :target_account_id,
-        :by_target_domain
-      )
+      params.slice(*ReportFilter::KEYS).permit(*ReportFilter::KEYS)
     end
 
     def set_report
diff --git a/app/controllers/admin/tags_controller.rb b/app/controllers/admin/tags_controller.rb
index 65341bbfb..59df4470e 100644
--- a/app/controllers/admin/tags_controller.rb
+++ b/app/controllers/admin/tags_controller.rb
@@ -73,7 +73,7 @@ module Admin
     end
 
     def filter_params
-      params.slice(:directory, :reviewed, :unreviewed, :pending_review, :page, :popular, :active, :name).permit(:directory, :reviewed, :unreviewed, :pending_review, :page, :popular, :active, :name)
+      params.slice(:page, *TagFilter::KEYS).permit(:page, *TagFilter::KEYS)
     end
 
     def tag_params
diff --git a/app/controllers/relationships_controller.rb b/app/controllers/relationships_controller.rb
index e6705c327..9d0be4a00 100644
--- a/app/controllers/relationships_controller.rb
+++ b/app/controllers/relationships_controller.rb
@@ -85,7 +85,7 @@ class RelationshipsController < ApplicationController
   end
 
   def current_params
-    params.slice(:page, :status, :relationship, :by_domain, :activity, :order).permit(:page, :status, :relationship, :by_domain, :activity, :order)
+    params.slice(:page, *RelationshipFilter::KEYS).permit(:page, *RelationshipFilter::KEYS)
   end
 
   def action_from_button
diff --git a/app/helpers/admin/filter_helper.rb b/app/helpers/admin/filter_helper.rb
index fc4f15985..130686a02 100644
--- a/app/helpers/admin/filter_helper.rb
+++ b/app/helpers/admin/filter_helper.rb
@@ -1,15 +1,15 @@
 # frozen_string_literal: true
 
 module Admin::FilterHelper
-  ACCOUNT_FILTERS      = %i(local remote by_domain active pending silenced suspended username display_name email ip staff).freeze
-  REPORT_FILTERS       = %i(resolved account_id target_account_id by_target_domain).freeze
-  INVITE_FILTER        = %i(available expired).freeze
-  CUSTOM_EMOJI_FILTERS = %i(local remote by_domain shortcode).freeze
-  TAGS_FILTERS         = %i(directory reviewed unreviewed pending_review popular active name).freeze
-  INSTANCES_FILTERS    = %i(limited by_domain).freeze
-  FOLLOWERS_FILTERS    = %i(relationship status by_domain activity order).freeze
-
-  FILTERS = ACCOUNT_FILTERS + REPORT_FILTERS + INVITE_FILTER + CUSTOM_EMOJI_FILTERS + TAGS_FILTERS + INSTANCES_FILTERS + FOLLOWERS_FILTERS
+  FILTERS = [
+    AccountFilter::KEYS,
+    CustomEmojiFilter::KEYS,
+    ReportFilter::KEYS,
+    TagFilter::KEYS,
+    InstanceFilter::KEYS,
+    InviteFilter::KEYS,
+    RelationshipFilter::KEYS,
+  ].flatten.freeze
 
   def filter_link_to(text, link_to_params, link_class_params = link_to_params)
     new_url   = filtered_url_for(link_to_params)
diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index 6a7f8831d..9bc6214af 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -142,15 +142,6 @@ function main() {
     return false;
   });
 
-  delegate(document, '.blocks-table button.icon-button', 'click', function(e) {
-    e.preventDefault();
-
-    const classList = this.firstElementChild.classList;
-    classList.toggle('fa-chevron-down');
-    classList.toggle('fa-chevron-up');
-    this.parentElement.parentElement.nextElementSibling.classList.toggle('hidden');
-  });
-
   delegate(document, '.modal-button', 'click', e => {
     e.preventDefault();
 
diff --git a/app/models/account_filter.rb b/app/models/account_filter.rb
index c3b1fe08d..c1e6b0deb 100644
--- a/app/models/account_filter.rb
+++ b/app/models/account_filter.rb
@@ -1,6 +1,21 @@
 # frozen_string_literal: true
 
 class AccountFilter
+  KEYS = %i(
+    local
+    remote
+    by_domain
+    active
+    pending
+    silenced
+    suspended
+    username
+    display_name
+    email
+    ip
+    staff
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/models/custom_emoji_filter.rb b/app/models/custom_emoji_filter.rb
index 15b8da1d1..414e1fcdd 100644
--- a/app/models/custom_emoji_filter.rb
+++ b/app/models/custom_emoji_filter.rb
@@ -1,6 +1,13 @@
 # frozen_string_literal: true
 
 class CustomEmojiFilter
+  KEYS = %i(
+    local
+    remote
+    by_domain
+    shortcode
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/models/instance_filter.rb b/app/models/instance_filter.rb
index 8bfab826d..9c467bc27 100644
--- a/app/models/instance_filter.rb
+++ b/app/models/instance_filter.rb
@@ -1,6 +1,11 @@
 # frozen_string_literal: true
 
 class InstanceFilter
+  KEYS = %i(
+    limited
+    by_domain
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/models/invite_filter.rb b/app/models/invite_filter.rb
index 7d89bad4a..9685d4abb 100644
--- a/app/models/invite_filter.rb
+++ b/app/models/invite_filter.rb
@@ -1,6 +1,11 @@
 # frozen_string_literal: true
 
 class InviteFilter
+  KEYS = %i(
+    available
+    expired
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/models/relationship_filter.rb b/app/models/relationship_filter.rb
new file mode 100644
index 000000000..51640f494
--- /dev/null
+++ b/app/models/relationship_filter.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class RelationshipFilter
+  KEYS = %i(
+    relationship
+    status
+    by_domain
+    activity
+    order
+  ).freeze
+end
diff --git a/app/models/report_filter.rb b/app/models/report_filter.rb
index abf53cbab..c32d4359e 100644
--- a/app/models/report_filter.rb
+++ b/app/models/report_filter.rb
@@ -1,6 +1,13 @@
 # frozen_string_literal: true
 
 class ReportFilter
+  KEYS = %i(
+    resolved
+    account_id
+    target_account_id
+    by_target_domain
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/models/tag_filter.rb b/app/models/tag_filter.rb
index 8921e186b..a9ff5b703 100644
--- a/app/models/tag_filter.rb
+++ b/app/models/tag_filter.rb
@@ -1,6 +1,16 @@
 # frozen_string_literal: true
 
 class TagFilter
+  KEYS = %i(
+    directory
+    reviewed
+    unreviewed
+    pending_review
+    popular
+    active
+    name
+  ).freeze
+
   attr_reader :params
 
   def initialize(params)
diff --git a/app/views/admin/accounts/index.html.haml b/app/views/admin/accounts/index.html.haml
index 7e9adb3ff..3a85324c9 100644
--- a/app/views/admin/accounts/index.html.haml
+++ b/app/views/admin/accounts/index.html.haml
@@ -22,7 +22,7 @@
 
 = form_tag admin_accounts_url, method: 'GET', class: 'simple_form' do
   .fields-group
-    - Admin::FilterHelper::ACCOUNT_FILTERS.each do |key|
+    - AccountFilter::KEYS.each do |key|
       - if params[key].present?
         = hidden_field_tag key, params[key]
 
diff --git a/app/views/admin/custom_emojis/index.html.haml b/app/views/admin/custom_emojis/index.html.haml
index 389e9dd71..69aa5ae41 100644
--- a/app/views/admin/custom_emojis/index.html.haml
+++ b/app/views/admin/custom_emojis/index.html.haml
@@ -25,7 +25,7 @@
 
 = form_tag admin_custom_emojis_url, method: 'GET', class: 'simple_form' do
   .fields-group
-    - Admin::FilterHelper::CUSTOM_EMOJI_FILTERS.each do |key|
+    - CustomEmojiFilter::KEYS.each do |key|
       = hidden_field_tag key, params[key] if params[key].present?
 
     - %i(shortcode by_domain).each do |key|
@@ -39,7 +39,7 @@
 = form_for(@form, url: batch_admin_custom_emojis_path) do |f|
   = hidden_field_tag :page, params[:page] || 1
 
-  - Admin::FilterHelper::CUSTOM_EMOJI_FILTERS.each do |key|
+  - CustomEmojiFilter::KEYS.each do |key|
     = hidden_field_tag key, params[key] if params[key].present?
 
   .batch-table
diff --git a/app/views/admin/email_domain_blocks/index.html.haml b/app/views/admin/email_domain_blocks/index.html.haml
index c1cc470b6..6015cfac0 100644
--- a/app/views/admin/email_domain_blocks/index.html.haml
+++ b/app/views/admin/email_domain_blocks/index.html.haml
@@ -4,7 +4,7 @@
 - content_for :heading_actions do
   = link_to t('admin.email_domain_blocks.add_new'), new_admin_email_domain_block_path, class: 'button'
 
-- if @email_domain_blocks.count == 0
+- if @email_domain_blocks.empty?
   %div.muted-hint.center-text=t 'admin.email_domain_blocks.empty'
 - else
   .table-wrapper
diff --git a/app/views/admin/instances/index.html.haml b/app/views/admin/instances/index.html.haml
index 1d85aa75e..0b299acc5 100644
--- a/app/views/admin/instances/index.html.haml
+++ b/app/views/admin/instances/index.html.haml
@@ -19,9 +19,8 @@
 - unless whitelist_mode?
   = form_tag admin_instances_url, method: 'GET', class: 'simple_form' do
     .fields-group
-      - Admin::FilterHelper::INSTANCES_FILTERS.each do |key|
-        - if params[key].present?
-          = hidden_field_tag key, params[key]
+      - InstanceFilter::KEYS.each do |key|
+        = hidden_field_tag key, params[key] if params[key].present?
 
       - %i(by_domain).each do |key|
         .input.string.optional
diff --git a/app/views/admin/reports/index.html.haml b/app/views/admin/reports/index.html.haml
index 30c7549b0..0263b80fb 100644
--- a/app/views/admin/reports/index.html.haml
+++ b/app/views/admin/reports/index.html.haml
@@ -10,9 +10,8 @@
 
 = form_tag admin_reports_url, method: 'GET', class: 'simple_form' do
   .fields-group
-    - Admin::FilterHelper::REPORT_FILTERS.each do |key|
-      - if params[key].present?
-        = hidden_field_tag key, params[key]
+    - ReportFilter::KEYS.each do |key|
+      = hidden_field_tag key, params[key] if params[key].present?
 
     - %i(by_target_domain).each do |key|
       .input.string.optional
diff --git a/app/views/admin/tags/index.html.haml b/app/views/admin/tags/index.html.haml
index 7f2c53190..1ff538ba3 100644
--- a/app/views/admin/tags/index.html.haml
+++ b/app/views/admin/tags/index.html.haml
@@ -28,7 +28,7 @@
 
 = form_tag admin_tags_url, method: 'GET', class: 'simple_form' do
   .fields-group
-    - Admin::FilterHelper::TAGS_FILTERS.each do |key|
+    - TagFilter::KEYS.each do |key|
       = hidden_field_tag key, params[key] if params[key].present?
 
     - %i(name).each do |key|
@@ -43,9 +43,8 @@
 
 = form_for(@form, url: batch_admin_tags_path) do |f|
   = hidden_field_tag :page, params[:page] || 1
-  = hidden_field_tag :name, params[:name] if params[:name].present?
 
-  - Admin::FilterHelper::TAGS_FILTERS.each do |key|
+  - TagFilter::KEYS.each do |key|
     = hidden_field_tag key, params[key] if params[key].present?
 
   .batch-table.optional
diff --git a/app/views/filters/index.html.haml b/app/views/filters/index.html.haml
index 8ace638ca..b4d5333aa 100644
--- a/app/views/filters/index.html.haml
+++ b/app/views/filters/index.html.haml
@@ -4,7 +4,7 @@
 - content_for :heading_actions do
   = link_to t('filters.new.title'), new_filter_path, class: 'button'
 
-- if @filters.count == 0
+- if @filters.empty?
   %div.muted-hint.center-text= t 'filters.index.empty'
 - else
   .table-wrapper
diff --git a/app/views/relationships/show.html.haml b/app/views/relationships/show.html.haml
index 0da1596ce..099bb3202 100644
--- a/app/views/relationships/show.html.haml
+++ b/app/views/relationships/show.html.haml
@@ -33,10 +33,9 @@
 
 = form_for(@form, url: relationships_path, method: :patch) do |f|
   = hidden_field_tag :page, params[:page] || 1
-  = hidden_field_tag :relationship, params[:relationship]
-  = hidden_field_tag :status, params[:status]
-  = hidden_field_tag :activity, params[:activity]
-  = hidden_field_tag :order, params[:order]
+
+  - RelationshipFilter::KEYS.each do |key|
+    = hidden_field_tag key, params[key] if params[key].present?
 
   .batch-table
     .batch-table__toolbar
diff --git a/app/views/settings/applications/index.html.haml b/app/views/settings/applications/index.html.haml
index 1cb94760f..a1f904a3a 100644
--- a/app/views/settings/applications/index.html.haml
+++ b/app/views/settings/applications/index.html.haml
@@ -4,7 +4,7 @@
 - content_for :heading_actions do
   = link_to t('doorkeeper.applications.index.new'), new_settings_application_path, class: 'button'
 
-- if @applications.count == 0
+- if @applications.empty?
   %div.muted-hint.center-text=t 'doorkeeper.applications.index.empty'
 - else
   .table-wrapper
diff --git a/config/routes.rb b/config/routes.rb
index 5411cff58..ff308699d 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -231,7 +231,7 @@ Rails.application.routes.draw do
         end
       end
 
-      resource :role do
+      resource :role, only: [] do
         member do
           post :promote
           post :demote