[iOS] [Enhancement] CornerRadius on control

[AbdellahMobiArchitects]

Hi @1iveowl
Will it be possible to adjust CornerRadius via the plugin?

[1iveowl]

Not at the moment, but it shouldn't be hard to implement.

I might look at it when I get some time. I can't promise anything, but feel free to create PR with the additional feature.

[ChaseFlorell]

I might be able to look into this and create a PR, however I wouldn't know how to do it on UWP or MacOS. Are you ok with a partial PR where unsupported platforms are simply not implemented?