[Feature Request] Unrounding Tracks

[vishnumaiea]

Just like we have the rounding option, it would be useful if we also have the unrounding option. This can be used when the rounding is performed using native fillets which are adjustable after application. I can remove the rounding simply by dragging a corner. Currently, applying a 0 rounding doesn't work. Unrounding can be applied to the select track or the entire board.

[mitxela]

An attempt has been made to implement unrounding. There are many problems relating to coordinate rounding errors, so an unrounded PCB probably won't match the source file exactly.