[popup] Initiate resize expectation during orientationchange -- Fixes #5153

Also, do not rapid-hide the popup during orientationchange, so if an orientationchange happens without any subsequent resize events (such as a 180 degree rotation), the popup doesn't blink out and in

Author: Gabriel Schulhof

js/widgets/popup.js

@@ -111,11 +111,13 @@ define( [ "jquery",
 		_resizeTimeout: function() {
 			if ( this._isOpen ) {
 				if ( !this._maybeRefreshTimeout() ) {
-					// effectively rapid-open the popup while leaving the screen intact
-					this._trigger( "beforeposition" );
-					this._ui.container
-						.removeClass( "ui-selectmenu-hidden" )
-						.offset( this._placementCoords( this._desiredCoords( undefined, undefined, "window" ) ) );
+					if ( this._ui.container.hasClass( "ui-selectmenu-hidden" ) ) {
+						// effectively rapid-open the popup while leaving the screen intact
+						this._trigger( "beforeposition" );
+						this._ui.container
+							.removeClass( "ui-selectmenu-hidden" )
+							.offset( this._placementCoords( this._desiredCoords( undefined, undefined, "window" ) ) );
+					}
 
 					this._resizeScreen();
 					this._resizeData = null;
@@ -129,17 +131,19 @@ define( [ "jquery",
 
 		_handleWindowResize: function( e ) {
 			if ( this._isOpen ) {
+				if ( !this._ui.container.hasClass( "ui-selectmenu-hidden" ) ) {
+					// effectively rapid-close the popup while leaving the screen intact
+					this._ui.container
+						.addClass( "ui-selectmenu-hidden" )
+						.removeAttr( "style" );
+				}
 				this._maybeRefreshTimeout();
 			}
 		},
 
 		_handleWindowOrientationchange: function( e ) {
 			if ( !this._orientationchangeInProgress && this._isOpen ) {
-				// effectively rapid-close the popup while leaving the screen intact
-				this._ui.container
-					.addClass( "ui-selectmenu-hidden" )
-					.removeAttr( "style" );
-
+				this._maybeRefreshTimeout();
 				this._orientationchangeInProgress = true;
 			}
 		},