Popup: Request window size during resize handling

Platform: iOS 7, page saved to home screen
For some mysterious reason this prevents the subsequent focus on an input
inside the popup caused by the user clicking on said input from somehow
resulting in a vclick on the popup's screen which, in turn, causes the popup to
close. I should sign up for a course on the occult.

Fixes gh-6961

Author: Gabriel Schulhof

js/widgets/popup.js

@@ -255,6 +255,16 @@ $.widget( "mobile.popup", {
 	},
 
 	_handleWindowResize: function(/* theEvent */) {
+
+		// https://github.com/jquery/jquery-mobile/issues/6961
+		// Platform: iOS 7, page saved to home screen
+		// Cue background occult chanting - for some reason retrieving the window coordinates at
+		// this point prevents subsequent focusins on the popup's inputs, if present, from
+		// resulting in a vclick on the popup's screen which, quite legitimately, causes the popup
+		// to close. At this point, I would like to request that the reader scratch their head in
+		// bewilderment.
+		getWindowCoordinates();
+
 		if ( this._isOpen && this._ignoreResizeTo === 0 ) {
 			if ( ( this._expectResizeEvent() || this._orientationchangeInProgress ) &&
 				!this._ui.container.hasClass( "ui-popup-hidden" ) ) {