[BUGFIX] Add missing implementation of refresh methods

This patch implements the missing refresh methods in the Viewport.js.
Workspaces need this method to refresh the content frame on switching
the workspace in the top menu.
Both methods now reload the according frames.

Resolves: #78421
Releases: master
Change-Id: I1266c873d00e7a811e23c36bc4be5c36b7899797
Reviewed-on: https://review.typo3.org/50362


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Marco Bresch <marco.bresch@starfinanz.de>
Tested-by: Marco Bresch <marco.bresch@starfinanz.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/backend/Resources/Public/JavaScript/Viewport.js

@@ -89,7 +89,7 @@ define(
 					return $('.t3js-scaffold-content-navigation-iframe').attr('src');
 				},
 				refresh: function() {
-					// refresh navi
+					$('.t3js-scaffold-content-navigation-iframe')[0].contentWindow.location.reload();
 				},
 				calculateScrollbar: function (){
 					TYPO3.Backend.NavigationContainer.cleanup();
@@ -133,7 +133,7 @@ define(
 					return $('.t3js-scaffold-content-module-iframe').attr('src');
 				},
 				refresh: function() {
-					// refresh content
+					$('.t3js-scaffold-content-module-iframe')[0].contentWindow.location.reload();
 				},
 				getIdFromUrl: function() {
 					if(this.getUrl) {