Summary:
**Motivation**
In iOS you cannot dismiss alerts by clicking outside of their box, while on Android you can. This can create some inconsistency if you want to have identical behavior on both platforms. This change makes it possible for Android apps to have irremovable/required alert boxes just like in iOS.
This adds an additional parameter to the Alert method. The way to use it is by providing an object with the cancelable property. The cancelable property accepts a boolean value.
This utilizes the Android DialogFragment method [setCancelable](https://developer.android.com/reference/android/app/DialogFragment.html#setCancelable(boolean))
**Usage example**
```js
Alert.alert(
'Alert Title',
null,
[
{text: 'OK', onPress: () => console.log('OK Pressed!')},
],
{
cancelable: false
}
);
```
**Test plan (required)**
I added an additional alert to the UIExplorer project where it can be tested. I also added a part in the Dialog Module test to make sure setting canc
Closes https://github.com/facebook/react-native/pull/8652
Differential Revision: D3690093
fbshipit-source-id: 4cf6cfc56f464b37ce88451acf33413393454721
Summary: Move all JS to a js/ subfolder so we get some overview of this folder again.
Reviewed By: bestander
Differential Revision: D3542598
fbshipit-source-id: 7637133fe4152f4d39e461b443b38510272d5bc8
Rickard Ekman
Ben Alpert
Pieter De Baets