Blender Git Loki

Merge branch 'master' into blender2.8

Merge branch 'master' into blender2.8

Merge branch 'master' into blender2.8

Cleanup: redundant comments

Class names are readable, no need for explanations of each one.

UI: 3D View, object menu

Changes from D2876 by @meta-androcto /w own edits

- Move "Relations" into own menu.

UI: 3D View, undo menu reorganization

Changes from D2876 by @meta-androcto /w own edits

Move 3x undo items into Undo menu,
these are such common operations they're typically accessed by keys.

Also add to menus which didn't have undo
(seemed random which modes had undo, undo history in their menus).

UI: 3D View, minor menu reorganization

Changes from D2876 by @meta-androcto

- Move "Delete" to the first menu item in most toplevel menus.
- Add separators.
- Consistent order of Undo/Redo

UI: 3D View Mesh "Select" menu reorganization

Changes from D2876 by @meta-androcto /w own edits

- Move "Select Linked" into own menu.
- Move "Select Loop" into own menu.

UI: 3D View "View" menu reorganization

Changes from D2876 by @meta-androcto /w own edits

- Move view axis & camera selection into "Viewpoint" menu.
- Move render border and clipping into border menu.
- Move Camera operators into own menu.
- View Selected was located in two menus,
Only expose the "use_all_regions" version when quad-view is used.

Cleanup: pep8/line length

Docs: correct descriptions

Fix part of T53038: principled BSDF clearcoat weight has no effect with 0 roughness.

Merge branch 'blender2.8' into topbar

Refresh gp cache while transform

The geometry cache must be recalculated when move keyframes in action editors.

Depsgraph: Use new ID management API to copy ID pointers

This solves issue with user counter on materials, objects and such,
additionally avoids having too much overhead of temporary lock and
datablock allocation.

Still need to do similar thing for scene copy, and look into nested
ID datablocks somehow.

Merge branch 'master' into blender2.8

Fix mistake in new ID copy code in 'no allocate' case.

Spotted by @sergey, thanks.

Fix wrong comment (leftover from dev time).

Merge branch 'blender2.8' into greasepencil-object

Depsgrpah: Fix crash when removing object