Blender Git Loki

Merge branch 'temp-openxr-ghostxr' into temp-openxr-blenderside

This will currently fail to compile. Fixes upcoming.

Merge branch 'temp-openxr-directx' into temp-openxr-ghostxr

Merge branch 'temp-openxr-buildstuff' into temp-openxr-directx

Merge branch 'master' into temp-openxr-buildstuff

Support forcing continuous gizmo redraws

Support inputting custom base pose location and Z-Axis rotation

Refactor reference pose setup, always sync with actual camera pose

Only use Z-axis rotation for base pose (grid aligned)

Cleanup: Rename anchor_object -> base_pose_object

The term "anchor" is already used differently in the context of XR, so
rather avoid the ambiguity.

Merge branch 'soc-2019-openxr' into vr_scene_inspection

Merge branch 'temp-openxr-blenderside' into soc-2019-openxr

Merge branch 'temp-openxr-ghostxr' into temp-openxr-blenderside

Merge branch 'temp-openxr-directx' into temp-openxr-ghostxr

Merge branch 'temp-openxr-buildstuff' into temp-openxr-directx

Merge branch 'master' into temp-openxr-buildstuff

Allow setting any object as "anchor" (to set base location/rotation)

Not sure how much of this will actually stay in, but it should allow us
experimenting with different ways to set the base position.
Also, when an anchor is set, the location/rotation of it and the VR base
position are synched.

Fix render settings not showing up for workbench engine

Support all 3D-view shading options for the VR session

Merge branch 'soc-2019-openxr' into vr_scene_inspection

Merge branch 'temp-openxr-blenderside' into soc-2019-openxr