Blender Git Loki

Cleanup: ID management: remove unused old `BKE_libblock_copy_for_localize` function.

Asset Catalogs: clean up catalog paths before using them

Clean up paths by trimming whitespace and separators
`/path/to/something ` ? `path/to/something`.

Merge branch 'master' of git.blender.org:blender into tracking_tools

Merge branch 'master' of git.blender.org:blender into tracking_tools

Fix T90519: USD Exporter Error

Fixes: `Error: metersPerUnit does not match retrieved type float`

Merge branch 'master' into tracking_tools

Enable Asset Browser by default for poses, rest stays experimental

Idea for 3.0 is to disable all functionality that isn't well polished
and focus on those parts first. Starting with poses.

* Adds a new experimental option "Extended Asset Browser", replacing
"Asset Browser".
* Unlike the previous option, this isn't enabled by default anymore.
This didn't work well in practice and caused plenty of confusion.
* "Mark as Asset" and "Clear Asset" are hidden if the option is
disabled.
* Same for the category selection in the Asset Browser.
* Always show display the "Only Assets" option in the File Browser while
browing inside .blend files. That way you can hide data-blocks that
are not pose assets.
* The Asset Library setup UI in the Preferences is always visible now,
it's needed for pose library access.

Addresses T90181, T90180 and T90300.

Differential Revision: https://developer.blender.org/D12120

Merge branch 'master' into soc-2021-knife-tools

Asset Catalogs: allow adding new catalogs

New catalogs can be added with `AssetCatalogService::create_catalog()`.
It only requires the catalog path, and convert that into a suitable
catalog ID itself. It is intended that artists won't have to bother with
assigning catalog IDs, and that editing those is more of an advanced
feature.

Adding a catalog will automatically save the catalog definition file to
disk.

Blender 2.83.18-rc

Asset Catalogs: gracefully handle catalog IDs without path

Ignore lines in a catalog definition file when it only contains the
catalog ID, and not the catalog path.

Cleanup: Keylist Drawing - Split up in multiple functions.

Knife: Enum for measurements and angle snapping mode in tool settings

Adds two new enums to the knife tool settings to select between angle snapping modes and measurement modes.
In the top bar these are displayed inside the popover.

Cleanup: asset catalogs, use doxygen comments

Use `/**` instead of `/*` for some function documentation comments.

No functional changes.

Asset Catalogs: pass root dir of asset library to AssetCatalogService

Pass the root directory of the asset library to the `AssetCatalogService`
constructor. This makes it possible for newly created catalogs to be saved
somewhere.

No functional changes.

Cleanup, Asset Catalogs: turn default catalog filename into a constant

Instead of hard-coding a path somewhere in the source, store it in a named
string constant.

No functional changes.

Cleanup: Asset Catalogs, make path separator static class member

Make `AssetCatalogService::path_separator` a static class member. There is
no need to make such constants per-object.

This in itself isn't that interesting a change, but it will be relevant
for an upcoming new string constant.

No functional changes.

Merge remote-tracking branch 'origin/master' into temp-asset-browser-catalogs

Cleanup: Minor comment update on `LIB_TAG_NEW`.

Compositor: Full frame Despeckle node