Don't send keyboard leaves to unmapped wayland surfaces

There are actually toolkits that create surfaces, do nothing with them,
and destroy them.  Sending keyboard leave events for this causes problems.

Fixes a bug in handling of some GTK popups.

src/bin/e_comp_wl.c

@@ -2382,7 +2382,12 @@ _e_comp_wl_client_cb_del(void *data EINA_UNUSED, E_Client *ec)
         ec->parent->lock_close = EINA_FALSE;
         ec->parent->modal = NULL;
      }
-   _e_comp_wl_keyboard_leave(ec);
+
+   /* FIXME: We should probably test if ec really has keyboard
+    * focus, but this at least catches GTK's silly habit of creating
+    * a surface, never attaching anything to it, then deleting it.
+    */
+   if (ec->visible)_e_comp_wl_keyboard_leave(ec);
 
    wl_signal_emit(&ec->comp_data->destroy_signal, &ec->comp_data->surface);