Sync render thread present with main thread. (#62)

* Experimenting with syncing the render thread.

* Separate wait functions for swap chains.

* Sync render thread present to the main thread.

* Move present to main thread and frame limit after presenting.

* g_next -> s_next

* Fix Vulkan validation errors.

* Make max frame latency configurable.

* Fix loading thread breaking waitable swap chain order.

UnleashedRecomp/ui/installer_wizard.cpp

@@ -1474,10 +1474,11 @@ bool InstallerWizard::Run(std::filesystem::path installPath, bool skipGame)
 
     while (s_isVisible)
     {
+        Video::WaitOnSwapChain();
         SDL_PumpEvents();
         SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT);
         GameWindow::Update();
-        Video::HostPresent();
+        Video::Present();
     }
 
     GameWindow::SetFullscreenCursorVisibility(false);