Separate rounding for inner corners

[wrab2]

Describe the feature

An option to set different rounding value for corners that are adjacent to other frames' corners

Why would it be beneficial

because it looks nice. Longer version is that I think with no gaps between frames rounded corners don't look good, and I don't like gaps between frames. So adding this will allow me to disable rounding of corners that don't need it but keep nice rounded look of a workspace as a whole. image showing an example of how it would look like with 0 inner radius and 10 outer