Fix border-image not drawing if background unset Support videos as background-image etc Add Texture.LastUsed - the number of frames since last used Texture has a ParentObject (so they can keep things like VideoPlayer from being garbage collected) Add IWeakInteropHandle to interopsystem, so c++ can reference c# objects that can get garbage collected VideoPlayer implement IWeakInteropHandle Add Debug/Full Garbage Collection VideoTextureLoader is weak, will let videos get garbage collected Remove Styles.TextBackgroundImage (not used)