Also includes fixes for instance data and resolving of textvar
references.
Also includes virtual d'tors for IBIS parser to get rid of all the
compile warnings on CLang.
Fixes https://gitlab.com/kicad/code/kicad/issues/12357
The properties editors are global but the frame that they reference is
not static, so we need to be able to update the frame reference when
restarting pcb editor from the main window. This updates the frame,
being careful to remove the signalling when closing pcbnew but keeping
the instance of the editor in place.
Fixes https://gitlab.com/kicad/code/kicad/issues/12297
Jeff Young
Seth Hillbrand
Jon Evans