Merge remote-tracking branch 'tootsuite/master' into merge-upstream

Conflicts:
 	app/models/status.rb

The conflict in the Status model was due to
5bf5003384.
It was resolved by accepting tootsuite's changes.

app/javascript/styles/mastodon/tables.scss

@@ -195,6 +195,7 @@ a.table-action-link {
       font-weight: 700;
       background: linear-gradient(to right, orange , yellow, green, cyan, blue, violet,orange , yellow, green, cyan, blue, violet);
       background-size: 200% 100%;
+      -webkit-background-clip: text;
       background-clip: text;
       color: transparent;
       animation: Swag 2s linear 0s infinite;