Multitasking view: Display modal dialogs on top of parent window.

lib/WindowManager.vala

@@ -181,5 +181,17 @@ namespace Gala {
          * @param direction The direction in which to switch
          */
         public abstract void switch_to_next_workspace (Meta.MotionDirection direction, uint32 timestamp);
+
+        /**
+         * Emitted when a new window is created.
+         * If workspace switch is in progress it gets emitted a window has been created (same as Meta.Display.window_created)
+         * Otherwise it gets emitted when window is being mapped.
+         *
+         * This signal exists because mutter doesn't emit map events when workspace switch is in progress.
+         * (see `meta_window_actor_show` function in mutter source code)
+         *
+         * @param newly created window
+         */
+        public signal void window_created (Meta.Window window);
     }
 }