gwl: Fix updating tooltips and previews when the applet's panel

is move to the top edge.

The new orientation was being treated as a boolean, and St.Side.TOP
resolves to 0, so when moving a panel to the top edge, it was not
updating the orientation for state listeners.

Fixes #10976

Ref:
linuxmint/mint21-beta#23

Author: mtwebster

files/usr/share/cinnamon/applets/[email protected]/applet.js

@@ -289,7 +289,7 @@ class GroupedWindowListApplet extends Applet.Applet {
 
         this.actor.set_style_class_name('grouped-window-list-box');
         this.state.set({appletActor: this.actor});
-        this.on_orientation_changed(null);
+        this.on_orientation_changed(orientation);
 
         this.getAutoStartApps();
         this.onSwitchWorkspace = throttle(this.onSwitchWorkspace, 35, false); //Note: causes a 35ms delay in execution
@@ -407,12 +407,11 @@ class GroupedWindowListApplet extends Applet.Applet {
     }
 
     on_orientation_changed(orientation) {
-        if (orientation) {
-            this.state.set({
-                orientation: orientation,
-                isHorizontal: orientation === St.Side.TOP || orientation === St.Side.BOTTOM
-            });
-        }
+        this.state.set({
+            orientation: orientation,
+            isHorizontal: orientation === St.Side.TOP || orientation === St.Side.BOTTOM
+        });
+
         if (this.state.isHorizontal) {
             this.actor.remove_style_class_name('vertical');
         } else {