Avatar: display 2 character initials if there is more than one name in the display name
Examples:
-
aardvark !baardvark
→AB
-
aardvark baardvark !caardvark
→AC
-
óvári
→Ó
-
őze
→Ő
-
John Double-Barrel
→JD
-
John
→J
What do you think?
Thank you
https://gitlab.gnome.org/GNOME/geary/-/commit/904f08e3fdd50e94daf947c8b0872e1c3b2f1cd7