Blender Git Loki

DRW: Fix outdated code.

Object Mode: Rework outline drawing.

This changes quite a few things.
- Outline is now per object.
- No more outline at object intersection (fix hairs problem).
- Simplify the code quite a bit.

We use a R16UI buffer to save one id per object outline. We convert this id
to color when detecting the outline.

Added textureGatherOffsets to the code but could not test on current hardware
so leaving it commented for now.

GPU/DRW: Add GPU_R16UI format.

DRW/GWN: Add callId builtin uniform.

This uniforms can be used to have a unique id for each drawcall of a shgrp.
This only works for standard shgroups and is an exception for the outline
drawing.

DRW: Culling: Fix algorithm for asymmetric perspective frustum reconstruction.

Initial working drag & drop for workspace tabs

Had to do quite some changes to get this to work, mainly because we'd
want to have the customized order written to files. Also wanted to use
existing wmDrag and wmDropBox code but modify it for our needs.
And of course, this should not just work for a single case, code should
be applicable to other areas as well.

Note that file read/write is not working (yet), neither is versioning, region
copying and deleting workspaces working.
Code is also very WIP, much of it is placed in temporary places and
such.

Once the basics are done, we can add nicer feeback during drag & drop.

UI Tweak: Rename "Grease Pencil" menu in 3D View to "Strokes"

Menu names in general should be a single word. Having two separate words makes it
visually confusing (i.e. it looked like there were 4 menu items, when in fact there
were only 3). Since the operators here operate on the GP strokes, it's reasonable
to use this term instead.

(Discussed with William as part of an informal UI review of GP branch)

Audaspace: Change default plugin path on windows.

This was suggested by Ray Molenkamp in order to avoid problems with
thumbnail dlls.

Fix compile error: Was missing 'const' qualifier

Cleanup: indentation

Merge branch 'master' into blender2.8

Cleanup: indentation

Cleanup: indentation

Indent lines for multi object editing, no functional changes.

Also strip trailing space from indented regions.

Multi-Object Editing

This adds initial multi-object editing support.

- Selected objects are used when entering edit & pose modes.
- Selection & tools work on all objects however many tools need porting
See: T54641 for remaining tasks.

Indentation will be done separately.

See patch: D3101

Fix T54491: Do not avoid the creation of inverted frustum.

Blender allows this.
The Cube in the file in the report would always disappear with the non camera view.
The clip_end was too small.
The correction here is only on the assert.

Cleanup: indentation

Merge branch 'master' into blender2.8

Cleanup: indentation

Cleanup: indentation

DRW: Culling: Reorganize frustum_boundbox_calc to match comments.

And Cleanup.