Blender Git Loki

Asset View: Always show all poses, avoid double-scrollbar

The asset view so far showed up to 5 items by default. If there were
more assets to be shown than that, it the list would become scrollable.
This would cause a scrollable box inside a scrollable region, which is
not nice for interaction. We can just expand the list so all assets are
in the layout, and the user can scroll the region rather than scrolling
the list.

Also hide the "grip" button so the list can't be resized. If needed we
could allow making the list smaller still, even if that causes double
scrolling again. For now keeping it simple.
Had to add a "no grip" option for that, so I changed the signature a bit
to avoid too many boolean arguments.

And another also: Adds missing return after error check.

Action preview rendering: properly tag the object when done

Rendering a preview for an Action requires temporarily modifying the pose
of some object (otherwise there is nothing to render); after this is done,
the object needs to be tagged correctly to flush the temporary changes.

Pose Library: lock the interface while flipping a pose

Flipping a pose Action temporarily changes the pose itself, which can cause
visual jitter. This is prevented by locking the interface while flipping.

Cleanup: Asset Browser, move Action-specific rendering code

Move some Action-specific code required to render the preview image into
the part of the code that is already Action-specific.

No functional changes.

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

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

Asset Browser: Apply a pose before rendering its preview icon

When rendering the preview icon of an Action, apply it to the pose
object first. This ensures that the "Refresh" button of a pose actually
uses that pose.

This splits some functions into two flavours, one that acts on all bones
and one that acts on the selected bones only. Normal use of the pose
library only acts on selected bones, but for the preview the entire pose
from the library is applied, regardless of selection.

Cleanup: Pose library, move pose backup code into its own file

Move the pose backup & restore functionality into its own file, so that
the functions can be called from other places in Blender as well.

No functional changes.

Merge branch 'master' into asset-browser-poselib

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

Assets: explicitly free the temp-loaded asset datablock

After temp-loading an asset datablock, explicitly free it before calling
`BLO_library_temp_free()`. Without this step, normal linking would be
performed, causing temp datablocks to actually be linked into the current
blend file.

Pose Library: set default blend percentage to 0%

Set default blend percentage to 0% to allow smoothly blending of the pose
asset into the current pose.

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

Use correct add-ons branch for `make update`

Also add TODO comments, hoping they help us not forget changing this
back for the merge to master.

Fix error on `context.copy()` because of asset-handle design

The File/Asset Browser no longer provides the `asset_handle` pointer. In
Python `asset_file_handle` needs to be used for now (will change in
future).

Assets: make `ASSET_OT_open_containing_blend_file` work in UIList

Make `ASSET_OT_open_containing_blend_file` in a asset view UIList as
well as the Asset Browser. This uses the context variables
`asset_file_handle` and `asset_library`, which are temporary in lieu of
a better asset API.

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

Update add-on HEAD for latest merge

Merge branch 'master' into asset-browser-poselib

Expose more asset info and utilities in the Python API

Needed so the pose library add-on can keep its operators work outside of
the Asset Browser context, namely with the asset view template.

An issue here is that we can't expose an asset handle from the Asset
Browser, because there is not permanently saved one whose pointer we can
pass around. This is planned to be addressed, but for now Python will
have to use the file wrapped by the asset-handle directly, via
`context.asset_file_handle`.