Blender Git Loki

Add library-hint to datablock search menus.

We had those for ID templates, but it's also tremendously useful for
regular ID pointers UI, since often you can get local and linked
data-block with same exact name...

Fetaure request from Spring team (and long due TODO...).

GPU: Fix faulty mac gpu detection

PyAPI: Use 'None' arg to clear header text

PyAPI: Support for 'None' string args from Python

This is needed because some RNA functions differentiate a NULL 'char *'
argument from an empty string.

Previously a NULL argument could be passed when the C definition
defined the default as NULL and the argument wasn't passed
which is a fairly hidden way of handling things.

Now strings use `PROP_NEVER_NULL` by default
which can be cleared for function arguments that allow None -> NULL.

Multi-Object EditMode: curve delete

D3859 by @zazizizou

Sequencer: replace notifier /w message-bus

Cleanup: keep RNA types sorted

Fix memory leak in workspace menu

UI: add uiItemMenuFN which frees it's argument

UI: add uiItemMenuFN which frees it's argument

Fix crash adding workspace

UI: Support using Ctrl+Scrollwheel to cycle properties editor tabs

Small side effect is that area operators (toggle fullscreen/maximized, duplicate
area) are now displayed in RMB-menu. Makes sense anyway.

UI: Move Properties editor context path into header

This will probably be a temporary solution to fill empty space, for until we
have a search button there. Hence, I made this optional using a compile flag.

WM: correct description for header/status_text_set

Make text a required argument for both.

3D View: use 1.0 opacity for wpaint shading

Now the colors are multiplied, faded color isn't useful to see weights.

Matches 2.7x behavior.

Eevee: Fix clearcoat materials not recieving AO

UI: Fix Studio Light panel in user preferencies

UI: Update Default Theme File After Recent Changes

UI: Vertical Properties Editor Tabs

Moves the Properties editor context switching to a vertical tabs region.

Design Task: T54951
Differential Revison: D3840

The tabs are regular widgets, unlike the 'old' toolshelf tabs. This means they
give mouse hover feedback, have tooltips, support the right-click menu, etc.
Also, when vertical screen space gets tight, the tabs can be scrolled, they
don't shrink like the toolshelf ones.
The tab region is slightly larger than the header. The tabs are scaled up
accordingly. This makes them nicely readable.

The header is quite empty now. As shown in T54951, we wanted to have a search
button there. This should be added next.

Implementation Notes:

* Added a new region type, RGN_TYPE_NAVIGATION.
* Having the tabs in a separate region allows scrolling of the tab-bar, unlike
the toolshelf tabs. We might want to remove the scrollbars though.
* Added a new region flag RGN_FLAG_PREFSIZE_OR_HIDDEN, to ensure the tab region
is either hidden or has a fixed size.
* Added some additional flags to support fine-tuning the layout in panel and
layout code.
* Bumps subversion.

UI: Support Displaying Enums as Tabs

Adds `uiLayout.prop_tabs_enum(data, property, icon_only)` to BPY.