Blender Git Loki

Merge branch 'master' into asset-experiments

Moar fixes (re ;ostly filtering mixed lib/data and regular files).

Make 'append/link' code handle data from several different sources at once.

Nothing really magic here, just grouping the imports by libfile/grouptype.
We could probably get better code (loop less on given list of 'files' to import)
but not sure it'd be worth it, this is not supposed to be a performance-critical point.

Moar fixes to sorting code and such.

Some flatmode fixes:

* Delete filelist when changing flat setting (so that we get immediate update when changing that setting).
* Disable flat when going up in tree (we ;ight actually want to do this everytime).

Merge branch 'master' into asset-experiments

Merge branch 'master' into asset-experiments

Reworked 'flat' mode, added it outside of blendfiles (libraries).

Note this is WIP, it 'breaks' load/append/etc. operators to some points,
and many other 'details' that need to be addressed.

Merge branch 'master' into asset-experiments

Merge branch 'master' into asset-experiments

Add basic 'glob' filter by name feature.

Not much to add, we'll likely add more filtering options (tags, categories...) later,
maybe for now we just need an 'exclude' option for name filter...

Refactor: do not filter each item twice! Mem usage here is not really an issue anyway.

Refactor filtering code, should be easier to add new filter options now.

Fix issues when data name have slash inside.

Adding `BLO_library_path_explode` simplies things. We might end getting rid of
`BLO_is_a_library` (or rather, merge back both things) later, though.

Fix stupid mistake preventing 'traditional' append/link

Cleanup: more.

Cleanup, remove tons of debug prints

Add icons to datatypes (IDs) in browser, when appending/linking.

Not yet previews, but still better than anonymous icon!

Merge branch 'master' into asset-experiments

Merge branch 'master' into asset-experiments