Blender Git Loki

Minor correction to manipulator arrow widgets

To avoid overlapping widgets (would ideally be handled by widget drawing code directly).

Cleanup

Merge branch 'master' into wiggly-widgets

Initialize manipulator widgets in different order (affects drawing order)

Various Cleanup

Support and use custom arrow line drawing verts

This gives us enough flexibility for some special manipulator drawing with combined axis types (like translate, rotate, scale manipulators enabled all together)
Now we also don't have to use immediate mode drawing.

It might also be interesting to support custom drawing callbacks, but for now this isn't really needed. Let's see!

Based on feedback by @psy-fi

Implement scaling manipulator

Fix rotation manipulator not hidden completely with all axes locked

Similar fix as rB6885d316b1b4e275, but had to fix it here too since we've duplicated that code.
Also removed unused defines.

Allow widgets to define custom line width (and use for manipulator)

Bring back manipulator circle widget for free transformation

Fade manipulator widgets out when hiding them because of angle to view

Aaaaand minor cleanup.

Get axes colors from theme setting again

(and update theme colors to be the colors we used previously for the new manipulator)

Hide manipulator axes that point towards the view

And of course more cleanup ;)

Moar cleanup (and some minor optimization)

Cleanup, cleanup and more cleanup!

More Adjustments to manipulator widget drawing

Corrections to previous commit

New, thinner drawing for circle widgets as well

Also minor cleanup

Draw widgets with multi-sampling

Fix compilation after latest merge from master