added line in event tile, removed box to make it cleaner
added line in event tile, removed box to make it cleaner

UCSD/campus-mobile,UCSD/campus-mobile,UCSD/campus-mobile,UCSD/campus-mobile,UCSD/campus-mobile,UCSD/now-mobile,UCSD/campus-mobile,UCSD/now-mobile,UCSD/now-mobile