Blender Git Loki

Fix rBb31ebd8c5c55: the asymmetric furstrum algorithm was still incorrect.

Although somewhat less micro efficient, I decided to separate the `viewinv` matrix to calculate the world position separately.
This makes it easier to understand the code.

Cleanup: move some screen utility functions, from topbar branch.

Cleanup: split off area reading/writing functions, from topbar branch.

Fix build errors after recent depsgraph changes.

Merge branch 'blender2.8' into blender2.8-workbench

Workbench: Added Object Color to collection_properties

Fix stubs

Fix T54609: Erros in precise BBox extraction algorithm

Depsgraph: Tag scene after changing cursor location

While 3d cursor is mainly an UI thing and isn't needed for scene evaluation,
it is stored in scene DNA. This means, operator is inform depsgraph that data
has changed, so all copies of that scene can copy new values.

Fixes lack of visual feedback when changing cursor location in viewport
with copy-on-write enabled.

Fix incorrect scene used for building freestyle stroke depsgraph.

Merge branch 'master' into blender2.8

Make ID icons safe for deletion from threads

Added a lock-free deferred queue for deletion. Now if ID icon
is requested to be freed from non-main thread, it will be added
to the deferred list. Actual deletion will happen later from main
thread.

Currently actual deletion only happens next time BKE_icon_id_delete()
is called, which might not be enough. But it's easy to enforce
deferred deletion.

Icons for preview images are not covered by deferred deletion yet.

Reviewers: mont29

Differential Revision: https://developer.blender.org/D3146

Added lock-free single linked list implementation

Only supports lock-free insertion for now, can not delete element
or traverse the list at the same time.

Merge remote-tracking branch 'origin' into blender2.8

Disable Feature Collada: Tests do not work on unix

The tests as they are now make string comparisons. This only works
on Windows because the reference files look different for different
operating systems because of different number formatting.
The collada tests need a complete rework (wip)

Fix object/bone select buffer big-endian sorting

Merge branch 'blender2.8' into blender2.8-workbench

Cleanup: unused function

Merge branch 'master' into blender2.8

Logging: edits to build on macOS