Blender Git Loki

Fix T59713: Moving bones between layers in edit mode doesn't show the dot icon in the layers UI

Fix for previous commit, accidental call to xrDestroySwapchain

Fix possible OpenXR swapchain leak by using new unique_oxr_ptr

Merge remote-tracking branch 'origin/master' into soc-2019-npr

Fix T67001: Studio and Flat lightning in single color do not respect clipping region

`DRW_STATE_CLIP_PLANES` has to be enabled independent of the workbench material.

Reviewers: fclem, jbakker

Differential Revision: https://developer.blender.org/D5278

Add helper class to RAII manage OpenXR handles

Adds generic unique_oxr_ptr to wrap xrCreate and xrDestroy functions of
OpenXR handles into a unique_ptr like RAII interface.

While for most cases, OpenXR resources can be freed by their owning
object, sometimes errors may occor before final ownership is established.
E.g. swapchain ownership is only transfered to the session object once
its swapchain-images are created - which may fail. With this RAII
wrapper, the swapchain would be freed on error (as this triggers stack
unwinding through an exception), no matter who holds ownership to it
currently.
There are other solutions to this problem, e.g. by establishing final
ownership right after/upon creation, or by explicit freeing in case an
error is spotted; it's too easy to make mistakes here though. Plus, we
may want to experiment with using this API for all OpenXR resources, to
entirely avoid the possibility of them leaking.

Fix T67115: Changing the Shape of a Force Field object does not refresh the animation

Undo System: replace with simpler binary diffing buffer storage

Applying/undoing incremental changes didn't fit well when
mixed with periodic snapshots from mem-file undo.

This moves to a much simpler undo system.

- Uses array storage with de-duplication from `BLI_array_store`.
- Loads the buffer into existing text data,
for better performance on large files.
- Has the advantage that Python operators can be supported
since we don't depend on hard coded undo operations.

Solves T67045, T66695, T65909.

Cloth: fix bug in sewing

v5v1 may not always exist (eg. cube with loose edges when triangulated can have different triangulation, may not be perfectly mirrored). This is now taken into account.

Fix compile error with USE_FORCE_WINDOWED_SESSION enabled

At least get it to compile, this is still kinda broken though.

Revert "use evaluated node tree"

This reverts commit eddb4d0af423b094d89266064e66b4133546ce7a.

Sometimes the evaluated node trees are not updated when the real
node tree changes. Use original trees until this is fixed.

Merge branch 'master' into greasepencil-object

Fix T66949: Can't select bones from multiple objects in wpaint mode

Fix T67047: Can't jump to frame when using jack in A/V sync mode

Similar fix to 495aff7.

Reviewers: brecht

Reviewed By: brecht

Maniphest Tasks: T67047

Differential Revision: https://developer.blender.org/D5268

Fix object selection when in pose mode

The new selected object was activated but not selected.

GPencil: Make sample modifier a part of simplify modifier.

LANPR: Feature line modifier UI consistensy with the rest.

GPencil: Renamed modifier "Length".

GPencil: Renamed modifier into "MultiStroke".

Merge remote-tracking branch 'origin/master' into soc-2019-npr