Blender Git Loki

Fix T66366: Multi object edit makes blender crash

Two issues here:

- Evaluated object data is to only be updated for selection only after modifier
stack is done its job. Otherwise it's possible to have selection batch update
called on an input data, at the same time as original object data is being
evaluated.

- If object's modifier stack did not create its own evaluated mesh (in case
when there is no effective modifiers, for example) can not update selection
on object's data, as it might cause threading issues between objects sharing
same data.