Blender Git Loki

Fix T50003, Bevel makes non-manifold mesh.

Problem was setting prev/next faces for edges around
a vertex on valence-2 vertices.

Cycles: Rename split_state and split_params

Now these are `kernel_split_state` and `kernel_split_params`, as well as
being references instead of pointers. This is to match `kernel_data`.

Fix crash when toggling area fullscreen

Make layout cycling work (Ctrl+Arrow Left/Right)

Rename angular hair spring things to hair instead of angular

This is to make a clear distinction between the existing angular hair
springs, and the new generic angular springs.

Make changing layout within workspace work

Cycles: Replace utility macros with functions from util_types.h

Fix T50020: adding a background image does not set image user data.

UI: add a message to indicate when using a modifier that wasn't
compiled.

This adds a short message to the smoke, remesh and boolean modifiers' UI
when trying to use them when their compilation was turned off. This was
already implemented for the fluid and ocean simulation modifiers.

This also makes the 'quick fluid' and 'quick smoke' operator abort and
report when trying to use them when unavailable.

Use pointer for master collection

This allows this pointer to be used, otherwise the pointer is not written

Rename: collections > scene/layer_collections

Read/Write, first take

Fix mistake in last (non-merge) commit

Merge branch 'blender2.8' into workspaces

Make layout template only show layouts of current workspace

Mainly had to do some changes to template_ID to make this work. It now supports setting a custom RNA collection to search the ID's in.

Depsgraph: Use HIGH priority for scheduled tasks

This kind of keeps threads "warmer" and should in theory give better
cache coherency bringing some %% of speedup. It was already tested
few months ago and it gave few % speedup in barber shop, but was
reverted due to some bone popping. The popping is now fixed so it
should be fine to use new scheduling policy.

Depsgraph: avoid more transitive relations for rigid body simulation

Depsgraph: Rigid body simulation doesn't need explicit time relation

It'll be dependent on time via Time Source -> Rebuild RB World chain.

Scale damping by spring length as well

I had forgotten to scale the damping forces...
This made for uneven damping on irregular meshes.

Depsgraph: Avoid transitive relation from local transform to final

There is always an uber eval node on the way. so we can avoid creating
some relations here in order to speed up both construction time and
evaluation.