Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/admin/base_controller.rb
  Some refactoring made upstream, no real conflict.
- app/javascript/mastodon/features/compose/components/compose_form.js
  Updated using upstream's code but using maxChars instead of the
  hardcoded length of 500 characters per toot.
- app/javascript/styles/mastodon/components.scss
  Upstream redesigned the onboarding modal. Not sure why we had a
  conflict there.

app/views/directories/index.html.haml

@@ -16,10 +16,6 @@
 
 .grid
   .column-0
-    .account__section-headline
-      = active_link_to t('directories.most_recently_active'), @tag ? explore_hashtag_path(@tag) : explore_path
-      = active_link_to t('directories.most_popular'), @tag ? explore_hashtag_popular_path(@tag) : explore_popular_path
-
     - if @accounts.empty?
       = nothing_here
     - else
@@ -29,10 +25,10 @@
             - @accounts.each do |account|
               %tr
                 %td= account_link_to account
-                %td.accounts-table__count
+                %td.accounts-table__count.optional
                   = number_to_human account.statuses_count, strip_insignificant_zeros: true
                   %small= t('accounts.posts', count: account.statuses_count).downcase
-                %td.accounts-table__count
+                %td.accounts-table__count.optional
                   = number_to_human account.followers_count, strip_insignificant_zeros: true
                   %small= t('accounts.followers', count: account.followers_count).downcase
                 %td.accounts-table__count

app/views/layouts/public.html.haml

@@ -7,9 +7,9 @@
             = image_tag asset_pack_path('logo_full.svg'), alt: 'Mastodon'
 
           - if Setting.profile_directory
-            = link_to t('directories.directory'), explore_path, class: 'nav-link'
-          = link_to t('about.about_this'), about_more_path, class: 'nav-link'
-          = link_to t('about.apps'), 'https://joinmastodon.org/apps', class: 'nav-link'
+            = link_to t('directories.directory'), explore_path, class: 'nav-link optional'
+          = link_to t('about.about_this'), about_more_path, class: 'nav-link optional'
+          = link_to t('about.apps'), 'https://joinmastodon.org/apps', class: 'nav-link optional'
         .nav-center
         .nav-right
           - if user_signed_in?