Blender Git Loki

Fix tool leader-key in image space

- This wasn't working for tool-systems that use the space data.
- Don't activate when the keymap is empty.

GPencil: Add merge materials to Cleanup menu

GPencil: Basic Merge Material Stroke operator

Still needs more work on merge algorithm, but at least this is the basic structure.

Merge branch 'master' into greasepencil-object

Merge branch 'blender-v2.81-release'

GPencil: Fix unreported missing stroke color for 1st popover material

Fix T59065: Blender default keyset is deletable by user!

Previously, you could delete presets that were part of the blender
default install. Now we check if the preset file resides in the bundled
file paths. If so, prevent deletion of the preset.

Reviewed By: Campbell

Differential Revision: https://developer.blender.org/D4522

Merge branch 'master' into soc-2019-bevel-profiles

Only move selected handles on the dragged side

E.g. when dragging a right handle, only move selected right handles,
keep keys and left handles untouch.

This is a bit hacky and feels fragile, since the transform operator
doesn't act just on the selection anymore. I plan to get some testing
before pushing this into master though.

Merge branch 'blender-v2.81-release'

Fix image paint showing project-paint settings

Also make projpaint a keyword-only argument to avoid copy-paste errors
like this re-occurring in the future.

make Get List Element node work again

remove unused code

make Pack List node work again

Merge branch 'master' into greasepencil-object

make some list nodes work again

Fix T71212: Drivers using scene.frame_current don't refresh on playback

Need to make such drivers explicitly dependent on time.

Depsgraph: Cleanup, use anonymous nsamespace

Jeeps overall line lengths with function definition shorter.

OpenSubdiv: Initial implementation of batched evaluation

The idea is to give multiple coordinates to evaluator and evaluate them
all at once, avoiding any possible overhead.

OpenSubdiv: Make internal evaluator aware of batched evaluation

Allows to pass multiple patch coordinates for evaluation.