Blender Git Loki

Merge branch '28' into custom-manipulators

Add wmManipulatorType, extract from wmManipulator

Having the type in mixed in with instance
made it hard to expose types to RNA/Python.

This disables face-map select,
we could enable it but it looks like face maps will be made to work
differently.

fix for packing materials, material index start value could overflow due to being a short instead of int

WIP: More UI changes and continuous drawing

More changes in the panels and enable continuous drawing mode by
default.

Set sculpt cursor when enter in sculpt mode

Include some cursor reset for other modes

Rename py API files

Will use for manipulator and manipulatorgroup.

also store material index in shards, so it can be loaded from blend later

fix for material assignment when converting back to objects

Merge branch '28' into custom-manipulators

Set the default cursor

Sometimes when restore previous cursor, the value is not the default, so it's better to set manually.

Sync with 2.8, various minor redundant changes

sync with 2.8

Merge branch '28' into custom-manipulators

WIP: More UI panel reorganization

WM: move manipulator API into its own files

Getting to be a hassle to track multiple manipulator classes
and callbacks.

Reset cursor if mode change

Enbale paint window cursor when enable paint mode

WM: add box preset and expose colors

WIP: UI panels reorganization

Moved the stroke placement to bottom of the viewport instead of Tools panel.

Merge branch 'blender2.8' into greasepencil-object