Display and search name in place of email address only

[kotecky]

Some senders do not have their name defined. When such an email is displayed in the mailbox, only the address is displayed. If there is a contact name associated with the email address in the Contacts, the name should be displayed and also used (as a synonym) in searches. (Or would it cause other issues? Which name when there is a duplicate in the Contacts?)

Reason: Some contacts have rather cryptic emails. Displaying the associated name would be helpful to identify and to search.

[gtandersen]

Good suggestion @kotecky!

@tadzik, what do you think?