[FIX]Usability fix of the icon size for module since_last_visit_new in jquery mode, for theme styles with a little bit less width by default in side modules

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49574 b456876b-0849-0410-b77d-98878d47e9d5