Tooltip for boosting depends on toot visibility (#1394) (#1754)

* Made tooltip for boosting depend on visibility

* Removed spaces that were added in merge conflict resolution

* Try again :P

* Added missing bracket

* Changed 'toot' to 'status'

app/assets/javascripts/components/locales/en.jsx

@@ -119,6 +119,7 @@ const en = {
   "status.mention": "Mention @{name}",
   "status.open": "Expand this status",
   "status.reblog": "Boost",
+  "status.cannot_reblog": "This status cannot be boosted",
   "status.reblogged_by": "{name} boosted",
   "status.reply": "Reply",
   "status.replyAll": "Reply to thread",