Pinned statuses (#4675)

* Pinned statuses

* yarn manage:translations

app/javascript/mastodon/locales/nl.json

@@ -168,6 +168,7 @@
   "status.mention": "Vermeld @{name}",
   "status.mute_conversation": "Negeer conversatie",
   "status.open": "Toot volledig tonen",
+  "status.pin": "Pin on profile",
   "status.reblog": "Boost",
   "status.reblogged_by": "{name} boostte",
   "status.reply": "Reageren",
@@ -179,6 +180,7 @@
   "status.show_less": "Minder tonen",
   "status.show_more": "Meer tonen",
   "status.unmute_conversation": "Conversatie niet meer negeren",
+  "status.unpin": "Unpin from profile",
   "tabs_bar.compose": "Schrijven",
   "tabs_bar.federated_timeline": "Globaal",
   "tabs_bar.home": "Start",