[Glitch] Prepend account header even when status list is empty

Partially port 90b64c0069

app/javascript/flavours/glitch/components/status_list.js

@@ -23,6 +23,7 @@ export default class StatusList extends ImmutablePureComponent {
     isPartial: PropTypes.bool,
     hasMore: PropTypes.bool,
     prepend: PropTypes.node,
+    alwaysPrepend: PropTypes.bool,
     emptyMessage: PropTypes.node,
     timelineId: PropTypes.string,
   };