Shorten the length of the link text to run/preview
Shorten the length of the link text to run/preview


As per eds email: (blocking bug)

the investigation name is sometimes so long that I 
can't see whether I'm previewing as a teacher or 
running it as a student
concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse