Blender Git Loki

COW Operators: Fix VIEW3D_OT_snap_cursor_to _active _selected _center and _grid

Reviewers: sergey, aligorith

Differential Revision: https://developer.blender.org/D3414

WIP setting up draw manager stuff...

Add defines in Overlays popover for Motion Paths

Restore editors/space_view3d/drawanimviz.c as draw/intern/draw_anim_viz.c

This was removed from the codebase with the Blender Internal removal,
but before the drawing code had been added to the new drawing engines.

Depsgraph: Enable copy on write by default

As was decided at today's dev kickoff, we're now moving to having
Copy-on-Write enabled by default, as 2.8 is barely functional with
it off.

To run Blender *without* COW (e.g. for testing), use:
--disable-copy-on-write

Eevee: Light Cache: Create Probe data and share the lightcache.

The lightcache is now can shared between viewlayers. We need this to share
the lighting data with the original viewlayer with the baking layer.

The cache is still not working.

Eevee: Light Cache: Add Operator and base implementation.

Does nothing at the moment. Just create a job and search all probes in a
view layer.

Only works if copy on write is enabled.

Make Mesh based eval the default for mesh sampling (generators unchanged).

Don't do implicit update in the hair export cache constructor.

Fix area tool getting out of sync w/ active tool

WM: call keymap callback from manipulators

Not currently needed, add to avoid confusion later on.

WM: use keymap poll for manipulators

Made a switch under Scene, and added files for LANPR adoptation.

Merge branch 'master' into blender2.8

Memory allocator: use lockfree calls internally

Was already used in some areas.

Multi-Object-Mode: EditCurve Select Random

D3405 by @dgriffin91

Fix memory leak in armature delete

Multi-Object-Mode: EditLattice Select All

D3164 by @ranjian0

Fix crash drawing edit-lattice

Edit-mode was never using batch cache.

Cleanup: naming

Use 'ob' prefix for objects, 'eval' suffix for evaluated data.