Make profile elements available in customer search

As a ServiceDesk agent I want to be able to find a customer by searching for a profile element value.

It is already possible to edit profile elements of customers from this overview. But it is currently not possible to search for a customer with a profile element.

Workaround
If a customer is a reporter on Jira issues can already search for a user profile field in the Jira search. This is described in more details in our knowledge base article "How do I search for user profile fields?"