Always animate worspace change properly

navigator.js

@@ -267,17 +267,6 @@ WindowManager.WindowManager.prototype._previewWorkspace = function(from, to, cal
                        y: yDest,
                        time: 0.25,
                        transition: 'easeInOutQuad',
-                       onComplete: () => {
-                           Main.uiGroup.set_child_above_sibling(
-                               toSpace.cloneContainer,
-                               fromSpace.cloneContainer);
-                       },
-                       onOverwrite: () => {
-                           Main.uiGroup.set_child_above_sibling(
-                               toSpace.cloneContainer,
-                               fromSpace.cloneContainer);
-                       }
-
                      });
     Tweener.addTween(toSpace.cloneContainer,
                      { x: 0,

tiling.js

@@ -70,10 +70,10 @@ function enable() {
         global.screen.connect(
             'workspace-switched',
             (screen, from, to) => {
-                let f = spaces.get(global.screen.get_workspace_by_index(from));
-                let t = spaces.get(global.screen.get_workspace_by_index(to));
-                Main.uiGroup.set_child_above_sibling(t.cloneContainer,
-                                                     f.cloneContainer);
+                Main.wm._previewWorkspace(
+                    global.screen.get_workspace_by_index(from),
+                    global.screen.get_workspace_by_index(to)
+                );
             }),
 
         // Reset primary when monitors change