Blender Git Loki

Fix mesh_build_data() calling mesh_finalize_eval() before copying texspace.

mesh_finalize_eval() may set ob->data to evaluated mesh, needs to be
done *after* call to BKE_mesh_texspace_copy_from_object(), else that one
is meaningless.

Related to investigations on T57985, but does not solve it at all. :(

Cleanup: remove useless redundant NULL check.

Fix T57070, T57389, and other bbox-related issues with meshes.

Thinks whole bbox code needs a complete rewrite, one can see a lot of
old history in it, it has way too many functions doing
nearly-the-same-thing(c), it spreads in very inconsistent ways across a
lot of files, ... But have no time for this right now, and would not be
a good idea with Beta comming up close anyway.

So for now going the simple and (hopefully) sane & safe way: forbid
object-level functions to affect data-level bbox. Mesh and curve ones
would generate bbox in obdata instead of object, for some reason (all
other obdata types only use object's bbox ever). That may have been
working in old ages, but with CoW and threaded depsgraph this is just
calling for piles of issues.

UI: Disable font shadow in tabs

This was used to fake a 3D look, however that doesn't work well with the new,
flat style. It just made text appear blurry.

Fix element count for edit strand drawing to account for primitive restart.

Fix problems with Mask button

Fix ALT key for boundary fill strokes

Add Simplify Blend Layers option

UI: Initial User-Preferences redesign

Implements the first changes for T54115:

* Rename "User Preferences" window to "Settings" in the UI.
We'll likely put workspace settings in there, separate from the global
user settings. System settings should become separate from user
settings in future to allow settings for specific hardware.
* Add sidebar region for navigation (scrolls independently).
Addresses space problems, so we can add more categories as needed now.
* Increase size of Settings window to compensate new navigation bar.
* Group sections into User Preferences and System.
Icons for section groups by Andrzej Ambroz. Thanks!
* Bumps subversion for file compatibility.

Screenshot: https://developer.blender.org/F5715337

I also added categories for future work, but commented them out.
We may also want to redesign contents of each section now.

Reviewers: brecht, campbellbarton
Differential Revision: https://developer.blender.org/D3088
Design Task: https://developer.blender.org/T54115

Texture Paint: prevent normal angle masking duplicating backface culling.

If backface culling is off, the user obviously wants to paint on
back faces, so the normal angle cutoff designed to prevent painting
at glancing angles shouldn't do the culling as a side effect.

Merge branch 'blender2.8' into greasepencil-object

Enable layer opacity in blend layers

Minor refactor of enum item grouping logic

Adjust Blend mode y Opacity to column

Use multisample for nomal blend

The layers are multisampled before blend

Rename User Preferences to Settings in new menus

Bump subversion for adding navigation region correctly on file load

Merge branch 'blender2.8' into userpref_redesign

Fix invalid vertex location in draw buffers caused by shadowed variable.

Reenable the hair test operator using customdata.