Blender Git Loki

Fix T60900, T61111, T61963: node values stuck after clearing keyframes.

This removes special dependency graph code that was intended to avoid GPU
shader recompiles by preserving the node tree and GPU material in specific
cases. This is no longer needed now that we have a general shader pass
cache that compares the generated shader code. The GPU material is already
being freed in material and world eval as well, so there's no point.

Note also that GPU materials are now safe to free from threads, actual
OpenGL buffer freeing happens delayed.

Tools: Re-order Weight Paint toolbar

-Group gradient with the other paint tools
-Nest the two Sample tools together
-Keep painting tools first, secondary tools after
-Make sure toolbar doesn't jump when selection is enabled

Fix T62327: Multires with Particles: Undo not working

Modifier stack was forced to be re-evaluated when it was not
supposed to. Should also improve sculpt performance.

Fix T62355: Running blender 2.80 headless broken in recent builds

Fix T59304: boolean modifier does not preserve UV textures.

In the old derivedmesh function it was merging customdata layers, added
that back for mesh conversion too.

Bevel: revert idea of always starting in offset mode.

Commit 208fafb to fix bevel tool units included a change to always
start modal in offset mode. This was may or may not be right but
broke a way in which users could set percent mode and then subsequently
start a modal that bevels in that mode. So going back to old way.

Fix crash reloading images used in compositor node

Similar to what Brecht committed in
38f0d5f75af7d2f30156f4008dc5bc8d8394fbf3.

Icons: Desktop icons update for Mac

Previous desktop icon was clipped on one side, and file icon used cropped icon.

Icons: Add GPencil Extrude and Radius icons (take 2)

Also, revision of icons for paint modes, based on suggestions by Aslam Cader.

Previous commit accidentally included an extra file.

Revert "Icons: Add GPencil Extrude and Radius icons"

This reverts commit a44d75a9646cc37b3b6b10decd22db90247795d2.

Icons: Add GPencil Extrude and Radius icons

Also, revision of icons for paint modes, based on suggestions by Aslam Cader.

Fix T62317: missing Cycles viewport update when changing active camera.

Fix T60978: crash toggling window fullscreen on macOS.

GHOST event handling does not need a window in the context, and restoring
it to the previous value is problematic if the window was deleted in the
meantime.

Cleanup: remove unused test break code for handling cancels.

Codestyle: comments

GPencil: Fix field type error in initialization

Cleanup: spelling

Cleanup: style

Cleanup: use doxy sections for node select API

Cleanup: use doxy sections for mask select API