Summary:
Previously If you set the visualiser too wide, the height adjusts with the aspect ratio and the bottom was cut off and there was no way to scroll. Have added a scrollbar if it exceeds the available height
Also the width state was promoted to an atom so the users resize amount is preserved when moving between plugins
A better solution might be to prevent the visualiser from getting too wide for the available hieght but it get complex when the window resizes.
Reviewed By: lblasa
Differential Revision: D43351294
fbshipit-source-id: f618a69ed025214593a74b952ce75c5fd98447cd
d24343d2ac