Blender Git Loki

Animation: add "LocRotScaleCProp" keying set

Add a keying set that includes location, rotation, scale, and custom
properties.

The keying set is intentionally not based on the "Whole Character"
keying set. Instead, it is generic enough to be used in both object and
pose animation, making it possible to quickly switch between animating
characters and props without switching keying sets.

This is, according to @rikkert, what the Blender Studio animators need
99.9% of the time.