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

Conflicts:
- Dockerfile
  Took upstream version and reverted f13ebd02c9.
  Hopefuly it's not needed anymore.
- app/controllers/api/v1/search_controller.rb
  The conflict was due to us raising the number of results returned.
  Upstream raised it further, so took it.
- config/locales/de.yml
  Took upstream changes to theme translation strings.
- config/locales/gl.yml
  Took upstream changes to theme translation strings.
- config/locales/nl.yml
  Took upstream changes to theme translation strings.
- config/locales/sk.yml
  Took upstream changes to theme translation strings.

app/javascript/mastodon/locales/en.json

@@ -146,6 +146,8 @@
   "hashtag.column_header.tag_mode.all": "and {additional}",
   "hashtag.column_header.tag_mode.any": "or {additional}",
   "hashtag.column_header.tag_mode.none": "without {additional}",
+  "hashtag.column_settings.select.no_options_message": "No suggestions found",
+  "hashtag.column_settings.select.placeholder": "Enter hashtags…",
   "hashtag.column_settings.tag_mode.all": "All of these",
   "hashtag.column_settings.tag_mode.any": "Any of these",
   "hashtag.column_settings.tag_mode.none": "None of these",
@@ -208,6 +210,7 @@
   "lists.account.remove": "Remove from list",
   "lists.delete": "Delete list",
   "lists.edit": "Edit list",
+  "lists.edit.submit": "Change title",
   "lists.new.create": "Add list",
   "lists.new.title_placeholder": "New list title",
   "lists.search": "Search among people you follow",