Avalonia - Couple fixes and improvements to vulkan (#3483)

* drop split devices, rebase

* add fallback to opengl if vulkan is not available

* addressed review

* ensure present image references are incremented and decremented when necessary

* allow changing vsync for vulkan

* fix screenshot on avalonia vulkan

* save favorite when toggled

* improve sync between popups

* use separate devices for each new window

* fix crash when closing window

* addressed review

* don't create the main window with immediate mode

* change skia vk delegate to method

* update vulkan throwonerror

* addressed review

Ryujinx.Ava/Ui/Controls/OpenGLRendererControl.cs

@@ -37,7 +37,7 @@ namespace Ryujinx.Ava.Ui.Controls
 
         public override void DestroyBackgroundContext()
         {
-            _image = null;
+            Image = null;
 
             if (_fence != IntPtr.Zero)
             {
@@ -57,6 +57,8 @@ namespace Ryujinx.Ava.Ui.Controls
             Dispatcher.UIThread.InvokeAsync(() =>
             {
                 Image = (int)image;
+
+                InvalidateVisual();
             }).Wait();
 
             if (_fence != IntPtr.Zero)
@@ -66,7 +68,7 @@ namespace Ryujinx.Ava.Ui.Controls
 
             _fence = GL.FenceSync(SyncCondition.SyncGpuCommandsComplete, WaitSyncFlags.None);
 
-            QueueRender();
+            InvalidateVisual();
 
             _gameBackgroundWindow.SwapBuffers();
         }