Thumnbail previews for both the layers and the animation timeline

It would be tremendously helpful if the Layers panel and the animation timeline would use thumbnail previews of their contents.

And an option to scale these up and down up to 256px.

I animate quite a lot in other animation software, and when I create pixel art animations in PM, I miss these two options.

I plan to add different timeline modes that also contain layers and maybe thumbnails. But this will take some time…