Taskbar: Use default buttons in ShutdownDialog

Author: https://github.com/krkk
Commit: c317275425
Pull-request: https://github.com/SerenityOS/serenity/pull/14172
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Services/Taskbar/ShutdownDialog.cpp

@@ -102,6 +102,7 @@ ShutdownDialog::ShutdownDialog()
     ok_button.on_click = [this](auto) {
         done(ExecResult::OK);
     };
+    ok_button.set_default(true);
     auto& cancel_button = button_container.add<GUI::Button>("Cancel");
     cancel_button.set_fixed_size(80, 23);
     cancel_button.on_click = [this](auto) {