Changing a contact name does not update the contact list immediately

Test instructions:

• Enter a conversation
• Open the menu
• Select 'change contact name'
• Enter a new alias and confirm
• Navigate back to the contact list
• Observe that the alias of the contact has already changed when arriving at the contact list
• Variant A: change the contact name to nothing (empty string into dialog)
• Variant B: after the contact alias was empty, change back to some non-empty alias