xwm: use attention request when activating invisible windows

src/xwayland/xwm.rs

@@ -2290,10 +2290,14 @@ impl Wm {
             Some(w) => w,
             _ => return Ok(()),
         };
+        if win.toplevel_data.visible.get() {
             let seats = self.state.globals.seats.lock();
             for (_, seat) in seats.deref() {
                 seat.focus_toplevel(win.clone());
             }
+        } else {
+            win.x.surface.request_activation();
+        }
         Ok(())
     }