apps+libui: Make app.run() call window->draw() automatically

apps/2048.cpp

@@ -360,7 +360,5 @@ Result<int> luna_main(int argc, char** argv)
     window->set_main_widget(game);
     game.reset();
 
-    window->draw();
-
     return app.run();
 }

apps/about.cpp

@@ -42,7 +42,5 @@ Result<int> luna_main(int argc, char** argv)
     ui::Label kernel_version(kernel_version_text.view());
     version_info.add_widget(kernel_version);
 
-    window->draw();
-
     return app.run();
 }

apps/taskbar.cpp

@@ -48,6 +48,7 @@ Result<int> luna_main(int argc, char** argv)
 
     auto window = TRY(ui::Window::create(bar, ui::WindowType::System));
     app.set_main_window(window);
+
     window->set_background(TASKBAR_COLOR);
 
     ui::HorizontalLayout layout(ui::Margins { 0, 0, 0, 0 }, ui::AdjustHeight::Yes, ui::AdjustWidth::No);
@@ -65,7 +66,5 @@ Result<int> luna_main(int argc, char** argv)
     StringView clock_command[] = { "/usr/bin/clock" };
     TRY(create_widget_group_for_app(layout, { clock_command, 1 }, "/usr/share/icons/32x32/app-clock.tga"));
 
-    window->draw();
-
     return app.run();
 }

libui/src/App.cpp

@@ -59,6 +59,8 @@ namespace ui
 
     Result<int> App::run()
     {
+        TRY(m_main_window->draw());
+
         return m_loop.run();
     }