Available from the usual ID submenu in the Outliner context menu.
The goal of this operator is to re-create the override from the linked
data, while preserving existing defined overrides.
This allows to update local opverrides when relations between datablocks
are changed in source library linked data.
Part of T76555.
This replaces header include guards with `#pragma once`.
A couple of include guards are not removed yet (e.g. `__RNA_TYPES_H__`),
because they are used in other places.
This patch has been generated by P1561 followed by `make format`.
Differential Revision: https://developer.blender.org/D8466
This means that we delete all override properties except for those over
ID pointers *if* the assigned pointer matches the linked data hierarchy.
Then we reload affected datablocks.
This commit enables basic copy of overrides on generic ID level, as well
as from (deep) copy operators for objects and collections.
So e.g. if your linked overridden caracter is in a collection, you can
now (from the outliner) Duplicate that override collection to get a new
overriding copy of the character.
We still need operators (new or modifying existing ones) to handle that
from 3DView e.g.
Note that deep copy code for objects/collections (and incidently
animdata) had to be modified to avoid duplicating/making local IDs that
remain linked ones being used by overrides ones.