Its members can be on copper layers, but the group itself isn't on any
layer.
Also fixes a bug where we were trying to clone TRIANGULATED_POLYGON::TRI
shapes as indexable sub-shapes. (The TRI only has indexes into its
parent, so cloning it will only result in segfaults down the line.)
Also fixes a bug where we weren't including copper items inside groups
when checking footprint net ties.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/15021
In addition to showing resolved clearance, we also show the calculated
clearance in the same method as is used for DRC. This will allow users
to better examine their system while working.
Fixes https://gitlab.com/kicad/code/kicad/issues/7934
Jon Evans
Jeff Young
Tomasz Wlostowski
jean-pierre charras
Seth Hillbrand
Wayne Stambaugh