Blender Git Loki

Fix panels being highlighted while dragging another panel over them

Redesign area/region edges

Mainly removed unnecessarily drawn edges and doubled line thickness for
area edges to clearly separate areas from regions.

For now I've added a theme option to control the color of the area
edges, we can check later if it's worth keeping it, but IMHO it's quite
important to have this controllable.

Merge branch 'alembic' into gooseberry

for now, deactivate loading for dynamic files again, there are still issues to solve (like proper cache handling after loading)

dynamic fracture: cache works much better now

Only use string properties from the cachelib for metadata.

Using ints and floats would require prefixing the Alembic metadata
keys, which becomes messy and ambiguous. Encoding other data types as
strings can be done on the python side as well.

Have to use IDP_ReplaceInGroup to overwrite ID properties that already
exist.

Don't draw widget outlines (for most widgets)

As proposed in T38037 this removes the outlines from widgets (except of
toggle buttons like layers and color buttons for now) to simplify/
flatten the look of the UI.

This needs some more polish and we could even remove the outline drawing
code completely instead of just disabling it, but I first want to get
overall design approval.

Increase default DPI to 78, decrease default font sizes to 10

NOTE: These changes might be controversial, but it's a good chance to
test this.

Also further changes to default font drawing plus a bit of cleanup.

Flatify the UI!

By disabling shaded drawing for all widgets

Make scrollbars thinner! (And draw them without outline)

Scrollbars with units printed on them stay the same size.

Python UI fix for displaying int and float properties as labels.

Added missing break statements.

Fix offset tabs due to changes in UI-graphical-redesign branch

Merge branch 'UI-graphical-redesign' into UI-experiments

Conflicts:
source/blender/editors/screen/area.c

Display extra metadata for the cache input archive.

Use ID property groups for storing and loading metadata associated to
Alembic archives.

Two separate property groups for metadata are used (so that reading
caches does not overwrite metadata for output caches).

Merge branch 'master' into UI-experiments

Merge branch 'master' into UI-graphical-redesign

Redesign panel headers + minor tweaks + minor cleanup

Currently looking like this: https://developer.blender.org/F183457

Design was worked out together with @plyczkowski