Blender Git Loki

GWN Immediate: use GWN_BATCH_OWNS_VBO for created with imm immBeginBatch.

UV Editor: Fix memleak with loop_vbo and loop_batch.

UV Editor: Style: rename variables to match others.

UV Editor: Fix memleak from recent changes.

Workbench: removed per collection object color

Will be part of the collection manager where per collection the
ob->col can be set. This currently depends on DepsGraph +
CollectionManager.

I removed it for now so the code won't influence development

Merge branch 'blender2.8' of git.blender.org:blender into blender2.8

Workbench: Diffuse studio lighting

UV Editor: Fix overflow issue with IMM usage.

Use batch API in this case.

It's not the ideal solution (slow) but it works.

UV Editor: Fix imm assert about program still bound.

Merge branch 'master' into blender2.8

Cleanup: rename Icon.type -> id_type

Confusing when adding non-id icons.

Merge branch 'blender2.8' of git.blender.org:blender into blender2.8

Workbench: drawtype object color from collection to v3d

Now every 3d view can have its own solid draw color setting

Fix: Armature display settings (names, axes, shapes, etc.) didn't refresh view with Copy on Write enabled

Now we need to tag the depsgraph to inform all copies that stuff changed.

Depsgraph: Fix crash with copy-on-write enabled

Was caused by ec0756af6c7, once again, we can't pass view layer,
need to pass index.

The sad part is that currently we don't have quick way to look up
view layer by index. Can do similar thing as we do for bones and
bases.

Fix edit-bone select crash w/ multi-edit

Also avoid duplicate base lookups and minor cleanup.

Fix bug with NULL context being used in undo

Caused sculpt to crash.

Port particle instance modifier changes from Gooseberry branch

The work is mainly from Lukas Toenne, with some modifications from myself.

Includes following obvious changes:

- Particle system selection is now name-based, with lookup menu.
- Lots of new options to control varieties.

Changes comparing to the Gooseberry branch:

- Default values and versioning code ensures same behavior as the
old modifier.

- Custom data layers are coming from vertex color, the modifier
does not create arbitrary layers now. The hope is to keep data
more manageable, and maybe make it easier to select in the shader
later on.

This means, values are quantized to 256 values, but it should be
enough to get varieties in practice.

Reviewers: brecht, campbellbarton

Reviewed By: brecht

Subscribers: eyecandy

Differential Revision: https://developer.blender.org/D3157

Merge branch 'blender2.8' of git.blender.org:blender into blender2.8

Workbench: added draw_scene_finish to workbench_materials