auto-move-windows: Exclude sticky windows from empty-check

We modify gnome-shell's workspace tracker to only remove empty
workspaces from the end. However we currently don't take into
account that sticky windows appear on all workspaces, so those
are preventing any workspace from getting removed at the moment.

Exclude them when determining whether a workspace is empty to
get the expected behavior.

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/135

extensions/auto-move-windows/extension.js

@@ -116,10 +116,12 @@ function myCheckWorkspaces() {
     let keepAliveWorkspaces = [];
     let foundNonEmpty = false;
     for (let i = this._workspaces.length - 1; i >= 0; i--) {
-        if (!foundNonEmpty)
-            foundNonEmpty = this._workspaces[i].list_windows().length > 0;
-        else if (!this._workspaces[i]._keepAliveId)
+        if (!foundNonEmpty) {
+            foundNonEmpty = this._workspaces[i].list_windows().some(
+                w => !w.is_on_all_workspaces());
+        } else if (!this._workspaces[i]._keepAliveId) {
             keepAliveWorkspaces.push(this._workspaces[i]);
+        }
     }
 
     // make sure the original method only removes empty workspaces at the end