Blender Git Loki

Gizmo: depth sort shear gizmos

Cleanup: move gizmo sort functions into an API

Optimization: Edit Mesh Overlay

In tests with edit_cage: performance jumped from 9.37ms to 9.17ms.

node_shader_utils: Proper fix for node_normalmap accessor returning ellipsis value.

Ellipsis value is internal ingredient only, to tag hidden _node_normalmap
'real' property as not yet initialized. Public node_normalmap accessor
should never ever have that value, it's either None or a valid node!

Revert "Fix error on FBX export after material changes"

This reverts commit ce4cfbe108d0641832d86a731ea32f596220b7c5.

Obviously wrong 'fix', please do not touch other dev?s code, especially
in active/WIP area, when you do not fully understand it.

Fix error on FBX export after material changes

Update the addons repository as well.

DRW: Fix DRW_shgroup_create_sub returning source shgroup

instead of the actual sub group...

EditMesh: Fix uninitialized value causing red outline on edges

ObjectMode: Fix Outlines being drawn for BBox meshes

ObjectMode: Fix instances with BoundBox drawtype not displaying

Shrinkwrap: implement the use of smooth normals in constraint & modifier.

- Use smooth normals to displace in Above Surface mode.
- Add an option to align an axis to the normal in the constraint.

I've seen people request the alignment feature, and it seems useful.
For the actual aligning I use the damped track logic.

In order to conveniently keep mesh data needed for normal
computation together, a new data structure is introduced.

Reviewers: mont29

Differential Revision: https://developer.blender.org/D3762

Merge branch 'master' into blender2.8

Conflicts:
source/blender/blenkernel/BKE_global.h
source/blender/editors/undo/ed_undo.c

DEBUG_IO: add sanity check on libdata in undo step as well.

There are serious suspicions that weird corruptions faced by studio
artists may happen in undo/redo code, so let's see whether that's the
case.

With this, and when --debug-io arg is passed on startup, the whole lib
data are checked at every undo. This makes undo slower (from two to
three times slower), but it could help us spot better what happens...

Expose 'debug_io' flag in bpy.app

Minor style cleanup.

Dope Sheet: fix assert in new hold code when bezier keys are not sorted.

Turns out this can happen during duplicate+drag operations.

Fix T57096: Crash when scaling bones

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D3777

Cleanup: remove some #if 0 blocks

Reviewers: brecht, campbellbarton

Differential Revision: https://developer.blender.org/D3802

Eevee: Fix error when using texture coordinate on world shaders

Compilation errors were happening on OSX with errors of the type:
```ERROR: Input of fragment shader 'viewNormal' not written by vertex shader```

UI: particle deflector options in topbar

See: T57228