Michal Kulinski 11594b8531 Fix navigation in UIExplorer. Use current index instead of fixed valu…
Summary:Motivation: After second navigation event in UIExplorer, content in main page always stayed the same.
Fix: For second and future navigation events use stack.index to retrieve state from stack.children.
Closes https://github.com/facebook/react-native/pull/6312

Differential Revision: D3018119

Pulled By: andreicoman11

fb-gh-sync-id: 4c502c42a0cb7b240e558515fb8fd766d6e1f856
shipit-source-id: 4c502c42a0cb7b240e558515fb8fd766d6e1f856
2016-03-07 03:04:23 -08:00
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2016-02-25 02:45:34 -08:00