Also improves the SNR and consistency of the menu item text. For
instance, a position is rarely useful, while relative sizes can be.
Also removes some unnecessary repitition, such as "Graphic Rectangle"
when "Rectangle" communicates the necessary information.
SetPosition() only changes the base position of tracks, we need to use
Move() to move the whole element.
This also cleans up white space and group handling in ratsnest
Fixes https://gitlab.com/kicad/code/kicad/issues/5188
This introduces layer handling to a lot of the geometry routines.
Many of them don't do much with it now, but it does help multi-layer
zones and will help when padstacks are implemented.
Jeff Young
Ian McInerney
jean-pierre charras
Seth Hillbrand
Qbort