if a work exists, show view item button in a job with created status.

Hi Terence,

I've included a fix for dsc-832 to show view item option for an existing work in a created job.  I've also started to add new EAD fields (for a EAD job) to the view item summary pane.  Could you please review these changes?

Thanks,

Shuang
Not sure why we need another subclass of a Work in Amber.