Fix T81925: incorrectly skipped string copy in test_env_path

Regression in 6f3a9031f7b93e7c687edde646beed9f02d920d4

Ref D9306

Fix T81925: incorrectly skipped string copy in test_env_path

Regression in 6f3a9031f7b93e7c687edde646beed9f02d920d4

Fix T81589: Correct drag type handling in outliner

Blender crashed when dragging and dropping color into the outliner.
This issue was cause by a missing check for the correct drag type
in `datastack_drop_poll`. The check is added in this commit.
Additionally, a new drag type is introduced for the "data stack"
drag option, that was introduced in commit 1572da858df4, to
differentiate it from the existing WM_DRAG_ID type.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D9169

Fix T77878: Hard minimum for voxel size of the remesh modifier

This patch fixes T77878 in the same way that T72747 was fixed.
A hard minimum for the voxel size was added to avoid an arithmetics error.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D8027

Merge branch 'blender-v2.83-release'

Fix T76277: Remove wrong cast in rna_NodeTree_update

This patch fixes T76277 by removing the incorrect cast from
`ptr->data` to `bNode`. The address of `ptr->owner_id` and
`ptr->data` both point to the node tree. Passing the node tree
incorrectly as a node into the `ED_node_tag_update_nodetree`
corrupts the data, because it attempts to set flags on the
node.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D7747

Merge branch 'blender-v2.83-release'

Fix T65012: Update depsgraph for matcap flipping

The matcap flipping didn't work with the workbench engine in rendered mode because
of a missing depedency graph update. This commit tags the scene id for a dependency
graph update in `toggle_matcap_flip`.

Reviewed By: fclem, sergey

Differential Revision: https://developer.blender.org/D7657

Fix T72476: Crash when drag & drop Color in the Image Editor

Merge branch 'blender-v2.83-release'