Merge remote-tracking branch 'origin/master' into gs-master

Conflicts:
 	app/serializers/initial_state_serializer.rb

The glitch flavour isn't yet pulling custom emoji data on its own (see
https://github.com/tootsuite/mastodon/pull/7047).  Once that gets into
the glitch flavour, we can eliminate the custom_emojis load.

app/javascript/mastodon/locales/en.json

@@ -276,6 +276,7 @@
   "tabs_bar.home": "Home",
   "tabs_bar.local_timeline": "Local",
   "tabs_bar.notifications": "Notifications",
+  "tabs_bar.search": "Search",
   "ui.beforeunload": "Your draft will be lost if you leave Mastodon.",
   "upload_area.title": "Drag & drop to upload",
   "upload_button.label": "Add media",