[Glitch] Freeze scroll position when a dropdown menu is open in the TL

Port 6fda3cbbeb to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

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

@@ -96,6 +96,7 @@ class Status extends ImmutablePureComponent {
     cacheMediaWidth: PropTypes.func,
     cachedMediaWidth: PropTypes.number,
     onClick: PropTypes.func,
+    scrollKey: PropTypes.string,
   };
 
   state = {