Blender Git Loki

Fix switching render layers + passes

Cycles : add a Volume Geometry Node

This splits the volume related data (properties for rendering and attributes) of the Mesh node
into a new `Volume` node type.

This `Volume` node derives from the `Mesh` class since we generate a mesh for the bounds of the
volume, as such we can safely work on `Volumes` as if they were `Meshes`, e.g. for BVH creation.
However such code should still check for the geometry type of the object to be `MESH` or `VOLUME`
which may be bug prone if this is forgotten.

This is part of T79131.

Reviewed By: brecht

Maniphest Tasks: T79131

Differential Revision: https://developer.blender.org/D8538

ran make format

GPencil: Change default Onion Keyframe mode to ALL

Now by default the selection mode is All keyframes types.

Also removed the icon for All option and renamed from `All Types`to `All`.

UI review by @pablovazquez

Use IMA_GPU_REFRESH

Show UV/paint overlay when no image available

Unavailable Texture Grid

Fix crash in Debug build for some cases of no intersects.

RNA: Validate scene/view-layer combination for statistics query

Users may input an invalid scene/view-layer combination via Python. We
can easily detect that and fail gracefully.

Besides checking input parameters in RNA, also assert the
scene/view-layer combination is valid in lower level Depsgraph lookup
function (called by statistics query).

Fix T79816: Restore scene.statistics() BPY function

This RNA/BPY function was removed in c08d84748804. For understandable
reasons really-- getting scene statistics from a string displayed in the
status bar is not exactly the best design. But we have committed to not
changing the RNA API too much for the 2.90 release, so we would like to
keep this functionality.

Differential Revision: https://developer.blender.org/D8604

Reviewd by: Julian Eisel

Fix incorrect number of recent items displayed in splash

After recent code cleanup in rB349eebd7.

Restore patch with catching python stdout after merge

Restored implementation with minor tweaks:
- now catching python output works for files (including not saved ones) and strings

Fix T79816: Restore scene.statistics() BPY function

This RNA/BPY function was removed in c08d84748804. For understandable
reasons really-- getting scene statistics from a string displayed in the
status bar is not exactly the best design. But we have committed to not
changing the RNA API too much for the 2.90 release, so we would like to
keep this functionality.

Differential Revision: https://developer.blender.org/D8604

Reviewd by: Julian Eisel

Cleanup: compiler warnings

Merge branch 'master' into soc-2020-testing-frameworks

GPUShader: Fix apple clang warnings

DRW: Fix crash drawing gpencil

Merge branch 'master' into soc-2020-info-editor

# Conflicts:
# source/blender/python/intern/CMakeLists.txt
# source/blender/python/intern/bpy_interface.c

Fixed Area Stretching overlay

Fixed UV Stretching GLSL Compilation error