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

Conflicts:
- `app/controllers/api/v1/statuses_controller.rb`:
  Conflict due to upstream adding a new parameter (with_rate_limit),
  too close to glitch-soc's own additional parameter (content_type).
  Added upstream's parameter.
- `app/services/post_status_service.rb`:
  Conflict due to upstream adding a new parameter (rate_limit),
  too close to glitch-soc's own additional parameter (content_type).
  Added upstream's parameter.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Conflict due to us not exposing theme settings here (as we have
  a different flavour/skin menu).
  Took upstream change, while still not exposing theme settings.
- `config/webpack/shared.js`:
  Coding style fixes for a part we have rewritten.
  Discarded upstream changes.

app/views/settings/profiles/show.html.haml

@@ -1,7 +1,10 @@
 - content_for :page_title do
   = t('settings.edit_profile')
 
-= simple_form_for @account, url: settings_profile_path, html: { method: :put } do |f|
+- content_for :heading_actions do
+  = button_tag t('generic.save_changes'), class: 'button', form: 'edit_profile'
+
+= simple_form_for @account, url: settings_profile_path, html: { method: :put, id: 'edit_profile' } do |f|
   = render 'shared/error_messages', object: @account
 
   .fields-row