- Improve contrast of ratsnest icons by removing blue
- Track icon: make blue as it is a board feature
- Muwave icon: remove handles, make serpentine blue, thicken and pixel align
- New, simplified zone and rule area icons
- Simplify draw tools by removing edit handles/guidelines - improves contrast
- Reorder draw tools in toolbar/menubar to make a little more sense
- Rotate measurement icon (ruler) to match bottom left -> top right
This allows to measure between features on a PCB. It uses a preview
EDA_ITEM in common, but due to the use of the IDs, it's currently
Pcbnew/Modedit only.
This also adds several "utils" for graphical functons useful when
drawing preview items on GAL canvases.
Fixes: lp:1467313
* https://bugs.launchpad.net/kicad/+bug/1467313