User email editing is broken as adminstrator

[T-Marenk]

When in the administration side of the software, trying to add emails to user does not work. It is possible to write the email, but the saving does not work. As soon as the page is refreshed, the old configuration is shown. This is also the case, when trying to change an emails priority.

[ConcernedHobbit]

• adding new email works
• editing old emails adds a new email instead
• removing emails does not work