Popup: Blur any focused elements inside container, including the cont…

…ainer itself, upon closing. Fixes #5974 - keyboard does not disappear when after the pop-up is closed.

(cherry picked from commit 4659c97)

Conflicts:
	js/widgets/popup.js

js/widgets/popup.js

@@ -656,13 +656,16 @@ $.widget( "mobile.popup", $.mobile.widget, {
 	},
 
 	_closePrereqsDone: function() {
-		var opts = this.options;
+		var container = this._ui.container;
 
-		this._ui.container.removeAttr( "tabindex" );
+		container.removeAttr( "tabindex" );
 
 		// remove the global mutex for popups
 		$.mobile.popup.active = undefined;
 
+		// Blur elements inside the container, including the container
+		$( ":focus", container[ 0 ] ).add( container[ 0 ] ).blur();
+
 		// alert users that the popup is closed
 		this._trigger( "afterclose" );
 	},