Pinned statuses (#4675)

* Pinned statuses

* yarn manage:translations

app/javascript/mastodon/locales/pt-BR.json

@@ -168,6 +168,7 @@
   "status.mention": "Mencionar @{name}",
   "status.mute_conversation": "Mute conversation",
   "status.open": "Expandir",
+  "status.pin": "Pin on profile",
   "status.reblog": "Partilhar",
   "status.reblogged_by": "{name} partilhou",
   "status.reply": "Responder",
@@ -179,6 +180,7 @@
   "status.show_less": "Mostrar menos",
   "status.show_more": "Mostrar mais",
   "status.unmute_conversation": "Unmute conversation",
+  "status.unpin": "Unpin from profile",
   "tabs_bar.compose": "Criar",
   "tabs_bar.federated_timeline": "Global",
   "tabs_bar.home": "Home",