Summary:
This fixes the following problem on iPad (happens when trying to show the devmenu ActionSheet):
> Terminating app due to uncaught exception 'NSGenericException', reason: 'Your application has presented a UIAlertController () of style UIAlertControllerStyleActionSheet. The modalPresentationStyle of a UIAlertController with this style is UIModalPresentationPopover. You must provide location information for this popover through the alert controller's popoverPresentationController. You must provide either a sourceView and sourceRect or a barButtonItem. If this information is not known when you present the alert controller, you may provide it in the UIPopoverPresentationControllerDelegate method -prepareForPopoverPresentation.'
I see 2 ways of fixing the issue: falling back to Alert (always displayed in the center) or adding a fake view somewhere on the screen to display the ActionSheet.
Reviewed By: mmmulani
Differential Revision: D3989672
fbshipit-source-id: 59fabc50ec1aac3ae6ddd7ecf4d8e8e5b9586dba
fd554c31c7