Blender Git Loki

Workbench: Cleaner Shadow edges own shadow

Change preference defaults

- Python tooltips: OFF
- Auto Perspective: ON
- Navigation Manipulator: ON
- Region Overlap: ON

See T47064

Add icon placeholders for all the armature ops that got recently added in the toolbar

The icon designers still need to create these, but it's better to have placeholders
so they remember to do it.

Fix crash linking/appending from old files in some cases.

Temporary main would not have a lock, which caused crashing when adding
datablocks.

Fix random crashes in the outliner, especially with bigger scenes.

The outliner can redraw quicker without rebuilding the tree, for example when
just moving the mouse and highlighting different items. The way this worked is
that the outliner would be tagged to avoid rebuilding, however if another
operation that does require rebuilding happens in the meantime we could go out
of sync and crash.

Pose Toolbar: Added Breakdowner/Push/Relax as separate tools

Currently all are stacked together, but perhaps if we don't get any other
tools in the meantime, it would make sense to have them separate.

Notes:
* No icons for now...
* There are some 2.8 bugs with the underlying operators (notably multi object)

Edit Armature Toolbar: Added some tools for "Shrink Fatten" (Alt-S) type bone transform tools

For fun, I tried adding some more edit armature tools to the toolbar to
check how this is all working. Icons are missing currently, but it's a
nice test.

Fix bone-size crash

Own regression from multi-object transform.

Merge branch 'master' into blender2.8

Cleanup: last spacetype enum name

Merge branch 'master' into blender2.8

Undo System: remove nested edit-mode undo calls

Regression in recent undo system changes,
This caused T55048.

When each mode had its own undo stack it was important
to initialize it when entering edit-mode.

Fix texture space transform crash

Own regression from multi-object transform.

Fix T55061: Shadows were not updated during sclupting.

Merge branch 'master' into blender2.8

Fix BMesh bisect not flagging dirty indices

Workbench: Enable Textures in Edit Mesh Mode

Constructed UV out of BMesh data layers.

Cleanup: Use switch statement to test the object type in snap functions.

EditMesh: updated extrude manipulator

Now plus icons are used to add,
arrows are used to adjust existing extrusions.

Manipulator: outline & helpline options for button