Blender Git Loki

Make knife drawing anti aliased (Monkey work based on D11333)

Knife tool.

Make the drawing anti aliased and consistent by using
3D_POLYLINE/3D_POINT shaders, and making sure alpha
blending is on.

Monkey work based on [[ https://developer.blender.org/D11333 | D11333 ]]
done by [[ https://developer.blender.org/p/krash/ | Anthony Edlin (krash)]]

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D12287