Blender Git Loki

Refactor: (Continue files for last commit)

Refactor: ED_lanpr functions renamed to ED_lineart

Refactor: some struct names for LANPR in editor module changed to eLineArt.

Refactor: Keep up with readfiles.c API changes for LANPR

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

Collection Colors: Lighter colors and combined bar and icon

Use more consistent colors, and draw a line and the collection icon
itself.

Changed calulation of theta_u in tree importance.

This reduces artifacts when using the light tree without splitting.

Before the theta_u was calclulated using a bounding sphere to
approximate a bounding box. This sometimes resulted in the cone
containng the bounding box much, much too big. Now theta_u is found
more carefully so that it is the smallest angle such that the cone
completely contains the bounding box.

Merge branch 'master' into soc-2020-outliner

Property Search: Don't remove layouts with search turned off

This mostly fixes panel headers, although they still end up with the same
problems as other layouts, with a minimum column size enforced for some
reason and misplaced labels.

Fluid: Modified flag grid display to show flag combinations with unique colors.

Merge branch 'master' into property-search-ui

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

Merge branch 'master' into property-search-ui

Property Search: Print debug with colors

Merge branch 'master' into newboolean

Merge branch 'master' into greasepencil-edit-curve

Merge branch 'master' into greasepencil-object

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

Fluid: Added display support for flag grid

Outliner: Colored collection icons

Draw the collection icons in the outliner. This may be changed in the
future.