desktop-ui: 'hide until ready' for Windows only

desktop-ui/desktop-ui.cpp

@@ -151,7 +151,9 @@ auto nall::main(Arguments arguments) -> void {
 
   program.create();
   presentation.loadEmulators();
+#if defined(PLATFORM_WINDOWS)
   presentation.setVisible(true);
+#endif
   Application::onMain({&Program::main, &program});
   Application::run();
 

desktop-ui/presentation/presentation.cpp

@@ -263,6 +263,10 @@ Presentation::Presentation() {
   setBackgroundColor({0, 0, 0});
   setAlignment(Alignment::Center);
 
+#if !defined(PLATFORM_WINDOWS)
+  setVisible();
+#endif
+
   #if defined(PLATFORM_MACOS)
   Application::Cocoa::onAbout([&] { aboutAction.doActivate(); });
   Application::Cocoa::onActivate([&] { setFocused(); });