Blender Git Loki

Fix build errors on MSVC.

Fix UI tooltips, layout, frame setting.

Fix NodetreeRef crashing due to null nodetree.

WM: add use_factory_startup option to read homefile operator

There was no way to reset the current file to factory settings
without reloading the preferences (which disables & re-enables add-ons),
this slows down resetting files and can complicate tests.

UI: add back Layout.introspect

Add back this function, removed 2e14b7fb9770b.

Useful for checking operators used in menus.

Merge branch 'master' into property-search-ui-v2

UI: simplify tool-tip logic for operators

- Use WM_operatortype_description to get the operator description.
- Pass properties to WM_operatortype_name,
so the operator name callback is used.
- Add UI_but_operatortype_get_from_enum_menu function
to access the operator from enum menus.
- Change WM_operatortype_description to return NULL when there is no
description, use WM_operatortype_description_or_name
when either can be used.

Fix crash accessing image space properties without an active window

Cleanup: spelling, rename attachement -> attachment

Cleanup: spelling

UI: Remove unecessary panel_free_block function

This function was called when the modifier list changes and the panel
list has to be rebuilt. Originally I thought it was necessary to to remove
the block immediately when the panel was removed, but we can just
leave it and it will be removed later in the UI drawing process.

Removing this results in fewer string lookups.

Cleanup: Reduce indentation level and variable scope

Exit early in some functions to reduce indentation level, declare
variables where they are initialized, and also clean up some
comment formatting.

Added comment for not comparing in run-test and message

Cycles: Separate Embree device for each CPU Device.

Before, Cycles was using a shared Embree device across all instances.
This could result in crashes when viewport rendering and material
preview were using Cycles simultaneously.

Fixes issue T80042

Maniphest Tasks: T80042

Differential Revision: https://developer.blender.org/D8772

Merge branch 'master' into property-search-ui-v2

Fix T80233: Extrude manifold can generate invalid geometry

Faces with only 2 sides were sometimes generated.

Merge branch 'master' into active-fcurve-keyframe

Fix Cycles build error when disabling some kernel features

Differential Revision: https://developer.blender.org/D8372

Fix T80031: UI: Use a more specific label for stencil mask opacity

This is not the opacity of the vertex colors itself but of the stencil
mask.

Follows up on rBbb4478f2fdd8426d6050bf7b7c09611afeb1bd14

Cleanup: GLFrameBuffer: Reduce indentation

GLFramebuffer: Avoid calling method on a partially destroyed GLContext

This avoid an ASAN runtime error.