Blender Git Loki

Fix T76556: Apply parenting when joining parent into object

The current behavior isn't necessarily "incorrect," but it's unintuitive
and confusing. A simple fix is to apply parentinv before finishing the
operator.

However, there may still be issues when the object's parent has a parent.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7723