Fixed 320 x 568 AdvancedDynamicTexture Fullscreen GUI

Frames with a AutoLayout get translated to stack panels. If you remove the auto layout it should use a rect instead.

I have noticed a bug that gradients are not being applied from frames, so working on that. I will update the main thread for the plugin when its ready. Figma to BabyonJS plugin!

EDIT: Actually gradients are working on frames regardless of autolayout.