Simple port with a few cosmetic changes:
- Attribute named "color" for indices VBO is now called "index"
- The indices VBO is now composed of `int`s instead of `uint`s (this simplifies the source)
Differential Revision: https://developer.blender.org/D14800
This commit moves the API of selecting faces, vertices and edges to a DRW manager engine.
Reviewers: campbellbarton, fclem
Subscribers: jbakker, brecht
Differential Revision: https://developer.blender.org/D5090
