Summary:
Previously we used an overlay to indicated selected but this was kind of hard to see due to <1 opacity. I think this approach where we enchance the border is clearer.
Also we used border colour earlier to indicate type of node which i think was never obvious to the user. Given that nodes heavily overlap we should remove this design language
changelog: UIDebugger, improve selected and hover state of the visualiser
Reviewed By: antonk52
Differential Revision: D45737758
fbshipit-source-id: 5299043656787d6479cff6ec2b38cebe8417fd53
cd67ce59f7