Custom Roles: Cannot edit an existing custom role, either says it exists if default lang or cannot save null if lang bundle and not defined.

[kcondon]

While testing a change to roles, found some weird behavior when I tried to edit the name of a custom role or add a description after it was created:

1. if languages are defined, eg. fr, en, and the bundles do not contain permission.role.not.created.alias.already.exists in the bundle file, then it throws a null exception.
2. if default en language bundle, then throws exception that role already exists. I believe rather than updating it is trying to add new and detects itself, so fails to write.

[pdurbin]

Editing custom roles doesn't work at all right now:

• Custom roles cannot be edited, throws error: "The role was not able to be saved. Role with this alias already exists" #8808