move some options from swap chain to engine configuration and fix not working VSync

examples/ExampleApps/BillboardExampleApp.cpp

@@ -42,6 +42,8 @@ namespace OpenVulkano
 			auto engineConfig = OpenVulkano::EngineConfiguration::GetEngineConfiguration();
 			engineConfig->SetNumThreads(4);
 			engineConfig->SetPreferFramebufferFormatSRGB(false);
+			engineConfig->SetFpsCap(0); // monitor's refresh rate
+			engineConfig->SetVSync(true);
 
 			std::srand(1); // Fix seed for random numbers
 			m_scene.Init();