Changes to the current user not reflected on account page and top bar

[JammingBen]

Describe the bug

When changing data (e.g. first and last name) of the the current user via the admin-settings, the changes are not being reflected on the account page and the top bar.

Steps to reproduce

1. As admin, go to the admin-settings and change the first and last name of yourself to something else
2. Check the topbar icon and the menu when clicking it -> it should represent the change, but it doesn't.
3. Check the account page -> it should represent the change, but it doesn't.

The solution would be to update the user in the UserState.