Blender Git Loki

Cleanup: variable naming

Merge branch 'master' into blender2.8

Cleanup: Get rid of context in editor 'new' callback

Requiring context means we can't easily create new editors to replace deprecated
ones in versioning code.
Think it's reasonable to give editors access to scene and area data for their
initial setup though. They mostly need it for setting "the view", as in,
scrolling values.

Also did minor cleanup in top-bar creation function.

Fix point density rendering in Cycles.

Fix: Adding new 3D View changes custom transform orientation to gimbal

Steps to recreate were:
* Create custom transform orientation.
* Change properties editor into 3D View.
* Trigger refresh of 3D view header by mouse hovering it.

Mistake in rB7d055da327b9555f.

Top-bar: Don't draw horizontal region separator

That way the tabs look nicely together with the lower sub-bar.

BLI_bitmap: 2D triangle drawing function

Matching polygon filling but no need for allocation or qsort.

BLI math: clamped barycentric weight calculation

Fix active region flickering in some cases, now always update before draw.

View3D: Atenuate banding artifacts on background gradient.

Dithering the output color for 8bit precision framebuffer with bayer matrix.
On my tests the bayer matrux patterns are not noticeable at all.

Note that it also does that in opengl rendered mode which can be in a much
higher bitdepth. We can fix that if that's a problem in the future but I
doubt it will.

Make sure hair follicle binding is updated before using invalid indices in drawing.

Merge branch 'blender2.8' into hair_guides

Fix feature set button misalignment.

Topbar: remove info editor menus, rename topbar menus for script compatibility.

We can still rename them later, but avoid breaking stuff for now.

Topbar: visual tweaks

* Make bottom half of topbar a bit higher
* Make tabs higher and put them closer together
* Remove screen layouts dropdown, we'll have one layout per window
* Hide action zones from topbar
* Don't change topbar background color when activating

Fix: Typos in operator names were resulting in warnings being printed to the console

Fix: D3160 fixed blednerplayer stub.s for unix

Fix topbar UI w/ no active object

Fix frame-buffer texture creation

- disable depth buffer didn't work.
- push/pop viewport bit was needed.

Cleanup: warnings