Pinned statuses (#4675)

* Pinned statuses

* yarn manage:translations

app/javascript/mastodon/locales/de.json

@@ -168,6 +168,7 @@
   "status.mention": "Erwähnen",
   "status.mute_conversation": "Mute conversation",
   "status.open": "Öffnen",
+  "status.pin": "Pin on profile",
   "status.reblog": "Teilen",
   "status.reblogged_by": "{name} teilte",
   "status.reply": "Antworten",
@@ -179,6 +180,7 @@
   "status.show_less": "Weniger anzeigen",
   "status.show_more": "Mehr anzeigen",
   "status.unmute_conversation": "Unmute conversation",
+  "status.unpin": "Unpin from profile",
   "tabs_bar.compose": "Schreiben",
   "tabs_bar.federated_timeline": "Föderation",
   "tabs_bar.home": "Home",