Blender Git Loki

Merge branch 'blender-v2.90-release'

Clip Editor: Make filter labels consistent

This was done for the regular dopesheet in rB9ccc73ade8a2, this just
makes that label consistent across all anim views.

Differential Revision: https://developer.blender.org/D8255

Merge branch 'blender-v2.90-release'

Fix T79031: Batch Generate-Previews doesn't work anymore

Caused by rB19785b96c43f.

Maniphest Tasks: T79031

Differential Revision: https://developer.blender.org/D8400

Merge branch 'blender-v2.90-release'

LineArt: Cleanup enum callback for quick line art.

Fix T79264: Mantaflow Field weights cannot be animated

rna_EffectorWeight_path() needs to point to "domain_settings" (instead
of "settings"), was a missing change when switching the FluidModifier to
mantaflow.

Maniphest Tasks: T79264

Differential Revision: https://developer.blender.org/D8398

LineArt: Conditinal showing of quick line art options.

GPencil: Handle single point curve

Merge remote-tracking branch 'origin/blender-v2.90-release'

Tests: show debugging hint when USDStageCreationTest fails

Setting the environment variable `PXR_PATH_DEBUG` non-empty will make the
USD library print the directories it uses to find its JSON files. This can
aid in debugging when this unit test fails. Now the failure message also
tells you about this.

No functional changes.

Cleanup: remove redundant return statement

This was found by clang-tidy.

LineArt: (missedd a new file).

LineArt: Quick line art set-up in add objects menu.

Merge branch 'blender-v2.90-release'

Fix T79341: Crash evaluating curve

Merge branch 'master' into greasepencil-object

Merge branch 'master' into greasepencil-edit-curve

Merge branch 'master' into lanpr-under-gp

LineArt: Don't retain line art buffer result after modifier evaluation.