Render panel in this test to make sure it can receive focus

crates/workspace2/src/workspace2.rs

@@ -532,6 +532,7 @@ impl Workspace {
             cx.notify()
         })
         .detach();
+
         cx.on_blur_window(|this, cx| {
             let focus_handle = this.focus_handle(cx);
             cx.focus(&focus_handle);