Adjust radius on other UI elelements

[tgriff42]

Firstly, THANK YOU I LOVE THIS!

Would you consider adding support for adjusting the radius on other things like dropdowns/buttons/sidebars/etc? If there's a good reason for not doing that, I understand, I'm assuming it might get kind of complicated.

[aspauldingcode]

Hi.

This is already being worked on. Here's a preview:

And outlines, and Squircle support