prompt: Truncate story title when it's too long
prompt: Truncate story title when it's too long

This makes the story list much nicer and formated better in case there
are very long story titles. The formatting is not broken any more since
the long titles are just truncated.

Story-Id: SF-47
Change-Id: e837226f51

salsaflow/salsaflow,salsaflow/salsaflow