MAINT-4734 (Separate transaction notices from group notice/invites)

 1) stripped off attachment field;
 2) made logos (group's, sender's, etc) in expanded view the same size as in condensed view;
 3) turned on notification showing upon click;
 4) fixed cropped right border of Invite and Transactions notifications;
 5) enabled "Collapse All" button;
 6) stripped off unnecessary icons.