fix(settings): no border on the window, let the compositor do it's job

src/shell/settings/settings_window.cpp

@@ -311,6 +311,7 @@ void SettingsWindow::buildScene(std::uint32_t width, std::uint32_t height) {
   auto bg = std::make_unique<Box>();
   bg->setPanelStyle();
   bg->setRadius(0.0f);
+  bg->setBorder(clearColor(), 0);
   bg->setPosition(0.0f, 0.0f);
   bg->setSize(w, h);
   m_panelBackground = static_cast<Box*>(m_sceneRoot->addChild(std::move(bg)));