Create BottomTabs once when options are applied

The BottomTabs library we use recreates its children each time a style property changes.
This can hinder performance quite a bit as the view creation logic is quite costly.
This commit introduces a simple fix to this issue - we delay view creation until all options are applied.

BottomTabs refactor
* Prevent view recreation in `onSizeChanged`
* Cleanup `createTabs` method