Blender Git Commit Log

UI: Add angle snapping to line gesture tools

This adds support for snapping for line gesture tool. It is implemented
in the modal keymap as Snap, which is a toggle (similar to how snapping
in the transform operator works).

Right now it snaps the angle of the line to 15 degree increments, which
is defined in code. This should be easy to expose in the UI in the future
if we need to.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D9115