Kestavow

This is the first stable release in the GNOME 50 series, with the following improvements since 49.0:

• The search experience has improved, automatically selecting all text when search is activated, as well as clearing the old search when you're done
• The import dialog now show a correct label when still loading contacts
• We use a more secure mechanism to load avatars
• Whenever a contact's name changes, the avatar now appropriately changes as well
• The overflow menu now has an export action

This release also updates translations in several languages.