During the first expansion, we are supposed to stop at vias and branches
(where three track ends connect). This needs to account for the number
of vias and tracks not just tracks
Locked pads are a bit different from other locked items
and there are sufficient reasons to need to select them
that it makes sense to introduce this inconsistency.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/6837
CHANGED: Ctrl-middle mouse button double click should perform
'Zoom to Objects' in Pcbnew, but a change in modifier key handling
broke it. This MR restores the functionality.
Fixes https://gitlab.com/kicad/code/kicad/issues/6740