float: apply damage when restacking

src/ifs/wl_surface/xdg_surface.rs

@@ -490,6 +490,7 @@ impl XdgSurface {
         let stack = self.popup_display_stack.get();
         for popup in self.popups.lock().values() {
             if let Some(dl) = &*popup.display_link.borrow() {
+                popup.popup.xdg.damage();
                 stack.add_last_existing(dl);
             }
             popup.popup.xdg.restack_popups();

src/tree/float.rs

@@ -519,6 +519,7 @@ impl FloatNode {
 
     fn restack(&self) {
         if let Some(dl) = &*self.display_link.borrow() {
+            self.state.damage(self.position.get());
             self.state.root.stacked.add_last_existing(&dl);
             if let Some(tl) = self.child.get() {
                 tl.tl_restack_popups();