[WIP] Add react keys to tabs and expanders #8683
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Expanders and tabs currently drop their state when unmounted/remounted (most often due to a new
element being inserted before the expander/tabs). This PR attempts to fix this by setting react keys
so that the components are retained across rerenders and thus don't lose their state.
Note this solution currently doesn't quite work because for whatever reason react is still dropping state
every now and then 馃槙. Currently trying to figure out why this is the case.
Closes #8239