Support Multiple parameters for CornerRadius

[BongaDev]

A clear and concise description of what you want to happen.
Would like to only alter one side of the button instead of all corners. For example how the Boxview API is implemented.

CornerRadius(Double, Double, Double, Double)
Where
"TopLeft={TopLeft},
TopRight={TopRight},
BottomLeft={BottomLeft},
BottomRight={BottomRight}")