Fixed: Can't save user without Initials.

Thanks to devagleo and xet7 !

Fixes #3928

client/components/settings/peopleBody.jade

@@ -342,7 +342,7 @@ template(name="editUserPopup")
       input.js-profile-fullname(type="text" value=user.profile.fullname required)
     label
       | {{_ 'initials'}}
-      input.js-profile-initials(type="text" value=user.profile.initials required)
+      input.js-profile-initials(type="text" value=user.profile.initials)
     label
       | {{_ 'admin'}}
       select.select-role.js-profile-isadmin