webadmin:Tasks with longer description overlaps date/time fixed

Tasks having longer description overlaps with date/time column
in tasks panel.The overlapping part of the text is now
replaced with '...' with proper padding.

Change-Id: I84795780163a8196825f66bde5f2394cbb82f871
Bug-Url: https://bugzilla.redhat.com/1023929
Signed-off-by: Karnan TC <kchidamb@redhat.com>