Blender Git Loki

Cleanup: spelling

Cleanup: clang-format

Cleanup: split sequencer.c file

Move most functions into separate files.

File sequencer.c is reserved for alloc, free and duplicating functions.

There should be no functional changes.

Merge branch 'blender-v2.91-release'
Bring in exact boolean fix.

Fix T82736, Exact Boolean fail with repeated subtraction of same object.

Two problems were fixed. One, the code for dissolving vertices
left a face around if dissolving a vertex would leave less than
three vertices. Instead, the face should be deleted.
Two, with transformations like "rotate 180 degrees", this should
be no problem with exact, but the current transformation matrix
has very small non-zero entries where it shouldn't. Cleaning the
transformation matrix makes it more likely that user expectations
about coplanar faces will be fulfilled.

In progress

Set up defaults when allocating UI data structs

Importer: Cleanup: Spellings

USD light import support.

Added USDLightReader class and the logic
to instantiate it when iterating over
the USD prims.

Merge branch 'master' into soc-2020-io-performance

Merge branch 'master' into xr-actions-D9124

XR: Enable switching action sets during session

Since xrSuggestInteractionProfileBindings() overwrites any existing
profile bindings, the solution is to suggest bindings from all action
sets at the same time (done just before attaching action sets to the
session).

Cleanup: Comments

Fix assert failure when regenerating preview icons

Would happen when changing material settings multiple times while the
material-slot list was visible with the material icon previews.

Separate File Browser Data From Asset Browser data

Internally, the Asset Browser is based on the File Browser. So if you opened
one of them as a regular editor and switched back and forth between them, data
like display options, current path and navigation history (for previous/next
navigation) would be shared between them. This was quite confusing and not what
users would expect.

Now the data is entirely separate: The Asset Browser can have its own display
options, navigation history, etc.

I had to refactor some bits. But I think the resulting code is actually cleaner
than what we had before.

Addresses T82103.

LineArt: Ris for New APIs

Merge branch 'master' into lanpr-under-gp

# Conflicts:
# release/datafiles/locale
# release/scripts/addons
# source/blender/blenloader/intern/versioning_290.c
# source/blender/makesdna/DNA_gpencil_modifier_types.h
# source/tools

Move disabling mouse coalescing after application launches.

Merge branch 'master' into refactor-idprop-ui-data

Geometry Nodes: Improve node group output modifier error

More than output for the modifier's node group is fine, because the
node group may be used in other situations, but the modifier will
not work if there is no geometry output socket.