Elm map: when we delete a marker, if the group is empty -> delete it
Elm map: when we delete a marker, if the group is empty -> delete it



SVN revision: 43972

rvandegrift/elementary,rvandegrift/elementary,rvandegrift/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,FlorentRevest/Elementary