* Only allow not-admins to assign groups they have themselves
* Only admins is allowed to change password of other admins
* Fixed issue with deep clone of UserGroup. The Allowed sections was not cloned. This resulted in the allowed sections of the object stored in cache was updated, everytime we changed the allowed sections on an object cloned from the cache. Even if we did not save it.
* Only Admins are allowed to add sections to a user group, that they don't have access to themselves
* Align backend code with UI. User managers that is are not admin, can only assign the same groups new users, that they have themselves.
* Make existingGroupAliases and empty array when creating a new user
Co-authored-by: Mole <nikolajlauridsen@protonmail.ch>
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