message_view: Update narrow title after change in narrow filter.

This needs to be done to update narrow title for different
`near` message targets or no `near` topic narrows.

web/src/message_view.js

@@ -282,6 +282,7 @@ export function try_rendering_locally_for_same_narrow(filter, opts) {
 
     message_lists.current.data.filter = filter;
     update_hash_to_match_filter(filter, "retarget message location");
+    message_view_header.render_title_area();
     return true;
 }