Blender Git Loki

Start preparing the Asset Browser UI

* Make sure exactly the wanted regions are visible
* Make sure toggling back and forth between the Asset and the File Browser
works fine (with correct region setup and other settings)
* Hide File Browser only region contents (e.g. panels on the left)
* Use thumbnail mode as default for the Asset Browser

Merge branch 'asset-metadata' into asset-browser

Updates for changes in master

Needed after last merge.

T79811 MacOS: Edit Mode - vertex/edge/face selection is missing

This is quite embarassing... it was returning the base instance instead of
the correct vao. No wonder that it was causing crash and at most drawing
issues.

GPencil: Fix angle initialization

GPencil: Cleanup compiler warnings

Add Asset Browser as sub-editor for the File Browser

This is the code design we agreed on to go with for now. See T73366.

Merge branch 'master' into asset-metadata

BLI: simplify lookup methods in Map

No functional changes expected.

Merge branch 'blender-v2.90-release'

Fix T80039: Do not subdivide with Multires is mesh has no faces

This skips the subdivision operation if the mesh has no loops, avoiding
the crash.

Reviewed By: sergey

Maniphest Tasks: T80039

Differential Revision: https://developer.blender.org/D8696

Fix T79819: crash with OSL trace() and getmessage() after Embree changes

The return value of scene_intersect must be checked, the isect struct members
can't be assumed to be initialized if that returns false.

Differential Revision: https://developer.blender.org/D8692

BLI: improve exception safety of Set and Map

For more information see rB2aff45146f1464ba8899368ad004522cb6a1a98c.

Fix T80076: Cycles Alembic Motion Blur Problem

The problem occurs when a deforming modifier is added to the object
after the MeshSequenceCache modifier. We should only consider the cached
velocities if the MeshSequenceCache modifier is the last one on the
object and we also need to check for the correct vertex count before
adding the motion vertex attribute.

Cycles: cleanup, remove unused parameter

This parameter was introduced during a revision of the Alembic motion
blur patch, and is not needed anymore.

Merge branch 'soc-2020-greasepencil-curve' of git.blender.org:blender into soc-2020-greasepencil-curve

Merge branch 'greasepencil-edit-curve' into soc-2020-greasepencil-curve

GPencil: Rename parameters

Merge branch 'blender-v2.90-release'

API Docs: Update Changelog from 2.83