This uncovered a memory corruption bug in MODULE's move operator,
several bugs in MODULE's move and copy constructors, and a bug in
BOARD's GetItem() call.
It also bumps the file format for saving/restoring groups inside
footprints.
Also simplifies groups so that other areas of code that have to know
about them at least don't have to know as much. One of the simplifications
is to not worry so much about empty groups until save time; others are in
the access logic to parent groups.
Also simplifies user model slightly by removing Merge and Flatten
(which are just ungroup/group and ungroup/ungroup/.../group).
Also allows multiple groups to have the same name. This is useful when
using groups for a classification system.
Fixes https://gitlab.com/kicad/code/kicad/issues/5788
ADDED memberOf() function for DRC rule expressions.
Also fixes a bug in several of the pickers where the event wasn't
being correctly passed.
Fixes https://gitlab.com/kicad/code/kicad/issues/5647
ViewGetLOD() returns the minimal value of a zoom to show an item.
However a zoom is a double, and using int as minimal value does not
allows setting a correct value in some cases.
ADDED: Allow DXF/SVG graphics to be imported as a group
Also, cleanup the placement routine to allow the edit tool's flip
and rotate routines to be used when placing the items.
Jeff Young
jean-pierre charras
Ian McInerney
Qbort