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react-native/Libraries/Alert
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Wes Johnson a64674375e Alert - allow for hiding alert title on iOS 
Summary:
Wanted a "message-only" alert on iOS that doesn't lead to the message being large & bolded via the title field (current state).

Before:

![screen shot 2017-08-28 at 9 22 04 pm](https://user-images.githubusercontent.com/1047502/29801514-fc3629d2-8c3d-11e7-86d5-f0a866301814.png)

After:

![screen shot 2017-08-28 at 9 26 56 pm](https://user-images.githubusercontent.com/1047502/29801521-071aa1ca-8c3e-11e7-9bd0-0a4682d81979.png)

It also aligns iOS with Android's current behaviour.

The above screenhots were generated from the `RNTester` example added herein.

Allowed for passing an empty string through to `UIAlertController.alertControllerWithTitle` so that the message could be rendered in its expected place on iOS (not as the title).

* Ran RNTester & compared example alerts before & after (below default with titles, for example)
* Ran end-to-end manual test suite (it's the only one I could get through without unrelated failures)

Before

![screen shot 2017-08-28 at 9 21 53 pm](https://user-images.githubusercontent.com/1047502/29801775-6e249ff0-8c3f-11e7-888b-2c4d5177a7d7.png)

After

![screen shot 2017-08-28 at 9 26 40 pm](https://user-images.githubusercontent.com/1047502/29801781-7270c4a8-8c3f-11e7-8b9b-59b2649646f2.png)
Closes https://github.com/facebook/react-native/pull/15685

Differential Revision: D5729420

Pulled By: hramos

fbshipit-source-id: 4866b0b24473ae35e9ebae09f2cee13a49d7717e
 		2017-08-30 17:16:17 -07:00
..
Alert.js Optional Alert onDismiss callback to support Android default behavior 2017-02-27 14:04:57 -08:00
AlertIOS.js Alert - allow for hiding alert title on iOS 2017-08-30 17:16:17 -07:00
RCTAlertManager.android.js inline a bunch of NativeModule requires 2017-02-17 16:49:38 -08:00
RCTAlertManager.ios.js Reorganize core JS files 2016-10-11 10:14:28 -07:00