Blender Git Loki

Merge branch 'blender-v2.81-release'

Fix T70714: Crash when using OBJECT_OT_material_slot_assign op without UI.

There is no guarantee we can get any valid UI from the context, and that
operator can work without it.

Fix T70695: Scene crashes Blender on open.

Note that this commit fixes the crash itself, but actual issue is *how*
that situation could happen (having insert override operation with local
'source' overriding data-block with an empty bone constraints stack...).

UI: Fix grid scale text not having shadows in the 3d view infos

This commit adds a shadow to the grid scale info text in the 3d View,
to make it more visible like the rest of that section.

{F7798605}

Differential Revision: https://developer.blender.org/D6025

Cleanup: Remove unused variable

Cleanup: Strict compiler warnings

Add Probot Stale configuration file

This is a configuration of Blender mirror on Github which automatically
closes Pull requests and gives developers instructions how to submit patch
to an official code review.

Differential Revision: https://developer.blender.org/D6027

Buildbot: don't add branch prefix when building release branches

GPencil: New Eyedropper tool for Material creation.

This patch is only for the eyedropper to create materials.

Options:
Click: Create Stroke Material
Shift+Click: Create Fill Material.
Shift+Ctrl+Click: Create Stroke and Fill Material.

Toolbar:

{F7718606}

Reviewed By: brecht, mendio

Differential Revision: https://developer.blender.org/D5688

Merge branch 'blender-v2.81-release'

Fix T69964: GPencil: Fill options are not shown on a properties editor

Differential Revision: https://developer.blender.org/D6041

GPencil: Remove curve objects after converting to strokes (unreported)

This was detected fixing T69459

Part of Differential Revision: https://developer.blender.org/D6045

Note: done in a separated commit to keep track of changes done not directly related to bug reported in T69459.

Fix T69459: Convert Curve to Grease Pencil clears Transform

Also changed to create a grease pencil object for each curve.

Part of differential revision: https://developer.blender.org/D6045

Fix issue in "make update" checking out submodule branch on buildbot

Version bump to 2.81 Beta

Version bump to 2.82 alpha, master is now open for new features and changes

Fix "make update" not using the right branch for source/tools

Version bump to 2.81.15

Docs: 2.81 release description for Linux appdata

Depsgraph: Inform when update or tag happens during evaluation

It is not allowed to do tagging or updates while dependency graph is
in the middle of evaluation.

This is something what is simple to violate from python code. This
change adds some sanity checks.

The request to update view layer or dependency graph will raise an
exception in Python now, so it's easy for scripters to notice.

Tagging for update will do silent return unless running with debug
command line argument. This is because it's a bit tricky to know
which exact dependency graph corresponds to a context from which
an update tag was triggered.

Differential Revision: https://developer.blender.org/D6035