Add a hide_notifications column to mutes

db/migrate/20170716191202_add_hide_notifications_to_mute.rb

@@ -0,0 +1,5 @@
+class AddHideNotificationsToMute < ActiveRecord::Migration[5.1]
+  def change
+    add_column :mutes, :hide_notifications, :boolean, default: false, null: false
+  end
+end