Blender Git Loki

Fix OpenCL performance regression after cubic interpolation.

Reorganize code to reduce register pressure.

Rework tab data storing to fix glitches & get rid of hacks

Fixes glitch where hovering an active tab would make the tab appear like
a hovered non-active one.

Still not the most beautiful solution, but it's as good as it can get
with our current UI code I'm afraid.

WIP: Basic rectangle primitive

Still pending to show the feedback ghost image while create the primitive.

Merge branch 'id_override_static' into asset-engine

Merge branch 'master' into id_override_static

Merge branch 'master' into fluid-mantaflow

Cleanup: Remove unused code

Merge branch 'blender2.8' into greasepencil-object

Cleanup: Change debug code

No functional changes.

Merge branch 'master' into blender2.8

Edit Mesh/Curve: Median center for click extrude

Was using bound-box center which depends on rotation.

Add some basic 4K render presets.

This difinition is becomming rather common now, time to add it to our
collection imho (requested in T53064).

Edit Mesh: click extrude, ensure inverse matrix

Relied on this being set elsewhere which isn't assured.

Merge branch 'master' into blender2.8

Correct bezier curve assert

Bezier curves should have v-points zero'd.

Merge branch 'master' into blender2.8

Cleanup: use const for events

Hide "Confirm on Release" button from transfor redo options

Hide-flag wasn't set so option shows up in keymap editor. But seems like
that flag is ignored there by now anyway.

Don't show redo buttons in top-bar if redo is not supported

Merge branch 'blender2.8' into topbar