Jay Salvat e62471b7c3 Fix pop method to properly refresh the navigatorBar
Summary:
When using nativator.pop() the navigatorBar doesn't refresh properly if we change navigationBarHidden.

When navigator.pop() is called, the navbar doesn't show up, even avec navigationBarHidden set back to true. See between Statusbar and Movie poster in the example below.

![bad](https://cloud.githubusercontent.com/assets/55496/8683849/77effa30-2a75-11e5-9f32-9be6fa87efac.gif)

    // Not actually updating the indices yet until we get the native
    // `onNavigationComplete`.
    updatingAllIndicesAtOrBeyond: null,

https://github.com/facebook/react-native/blob/master/Libraries/Components/Navigation/NavigatorIOS.ios.js#L510-L512

The View need to be refreshed in pop method anyway.

    updatingAllIndicesAtOrBeyond: this.state.requestedTopOfStack - n,

Now, navbar appears properly.

![good](https://cloud.githubusercontent.com/assets/55496/8683907/be9d2714-2a75-11e5-8fda-653e68869076.gif)
Closes https://github.com/facebook/react-native/pull/1989

Reviewed By: svcscm

Differential Revision: D2798515

Pulled By: androidtrunkagent

fb-gh-sync-id: 9d554c9d88b87628488a8cebb7e3bbe4dd9c017d
2016-01-02 22:52:30 -08:00
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