Fix context menu caching bug
Fix context menu caching bug

Summary:
The memoized callback didn't have any dependencies, so whenever a context menu was computed for a component, it was never changed again.

This broke the network plugin as the context menu should change depending on what element is selected.

Reviewed By: cekkaewnumchai

Differential Revision: D20596750

fbshipit-source-id: 275453d972079954e310fd3e97f2dd9f437bf748

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper