Many of the icons had lots of interior geometry left over from
subdivision. In these cases we should remove the interior geometry
and leave the object with the modifier for the future.
- Tweaked GP toolbar icons and added Line, Rectangle & Circle.
- Added the remaining toolbar icons for all our paint & sculpt modes.
- Made all the toolbar icons the same simple style.
Regenerating all to remove zero area triangles.
Previously icons included files not committed to lib/.
This is the output of 'make icons_geom' for svn rev: 62081.
