Add option to hide notification markers

app/javascript/flavours/glitch/features/local_settings/page/index.js

@@ -113,6 +113,14 @@ class LocalSettingsPage extends React.PureComponent {
             <FormattedMessage id='settings.notifications.favicon_badge' defaultMessage='Unread notifications favicon badge' />
             <span className='hint'><FormattedMessage id='settings.notifications.favicon_badge.hint' defaultMessage="Add a badge for unread notifications to the favicon" /></span>
           </LocalSettingsPageItem>
+          <LocalSettingsPageItem
+            settings={settings}
+            item={['notifications', 'show_unread']}
+            id='mastodon-settings--notifications-show_unread'
+            onChange={onChange}
+          >
+            <FormattedMessage id='settings.notifications.show_unread' defaultMessage='Show unread marker' />
+          </LocalSettingsPageItem>
         </section>
         <section>
           <h2><FormattedMessage id='settings.layout_opts' defaultMessage='Layout options' /></h2>

app/javascript/flavours/glitch/features/notifications/index.js

@@ -61,8 +61,8 @@ const mapStateToProps = state => ({
   hasMore: state.getIn(['notifications', 'hasMore']),
   numPending: state.getIn(['notifications', 'pendingItems'], ImmutableList()).size,
   notifCleaningActive: state.getIn(['notifications', 'cleaningMode']),
-  lastReadId: state.getIn(['notifications', 'readMarkerId']),
-  canMarkAsRead: state.getIn(['notifications', 'readMarkerId']) !== '0' && getNotifications(state).some(item => item !== null && compareId(item.get('id'), state.getIn(['notifications', 'readMarkerId'])) > 0),
+  lastReadId: state.getIn(['local_settings', 'notifications', 'show_unread']) ? state.getIn(['notifications', 'readMarkerId']) : '0',
+  canMarkAsRead: state.getIn(['local_settings', 'notifications', 'show_unread']) && state.getIn(['notifications', 'readMarkerId']) !== '0' && getNotifications(state).some(item => item !== null && compareId(item.get('id'), state.getIn(['notifications', 'readMarkerId'])) > 0),
   needsNotificationPermission: state.getIn(['settings', 'notifications', 'alerts']).includes(true) && state.getIn(['notifications', 'browserSupport']) && state.getIn(['notifications', 'browserPermission']) === 'default',
 });
 

app/javascript/flavours/glitch/reducers/local_settings.js

@@ -55,6 +55,7 @@ const initialState = ImmutableMap({
   notifications : ImmutableMap({
     favicon_badge : false,
     tab_badge     : true,
+    show_unread   : true,
   }),
 });