Summary: For RN Debugger an ugly hack is used that roars its head now again; to make sure that the embedded debugger state isn't lost when switching to a different plugin, the chrome devtools are rendered _outside_ the domNode where they should normally appeared, and made invisible rather than removed when becoming invisible. Since at this moment this is the only place where we apply the trick, figured for now to condone it, rather than making a neater abstraction out of it (or kiling it all together)
Reviewed By: passy
Differential Revision: D24786771
fbshipit-source-id: 726617899bc620fc8b9db677d9413b31d5ad7653
c9b08695d5