Fix layout issue on plugin container
Fix layout issue on plugin container

Summary: Reverted a change in D30192002 (https://github.com/facebook/flipper/commit/9e5575cf6909b85c0321824e0b13276c3ddf8f6d) that unintendendly caused some plugin containers to grow too big.

Reviewed By: nikoant

Differential Revision: D31609023

fbshipit-source-id: 56daa5efe6d9071a856536a59b473f17796201eb

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