Bastien Montagne
3fcf535d2e
This is purely internal sanitizing/cleanup, no change in behavior is expected at all. This change was also needed because we were getting short on ID flags, and future enhancement of 'user_one' ID behavior requires two new ones. id->flag remains for persistent data (fakeuser only, so far!), this also allows us 100% backward & forward compatibility. New id->tag is used for most flags. Though written in .blend files, its content is cleared at read time. Note that .blend file version was bumped, so that we can clear runtimeflags from old .blends, important in case we add new persistent flags in future. Also, behavior of tags (either status ones, or whether they need to be cleared before/after use) has been added as comments to their declaration. Reviewers: sergey, campbellbarton Differential Revision: https://developer.blender.org/D1683