Fix: Sort problem caused when two candidates have the same confidence
Fix: Sort problem caused when two candidates have the same confidence

If more than one lesion candidate have the same confidence value,
then they should be sorted according to the display_id.
Otherwise 'CAD detail' tab shows them in a strange way.

fixes #21

utrad-ical/circus_cs_web_ui,utrad-ical/circus_cs_web_ui