Bug 1110845 - Two-way bind the job details pane

This work fixes Bugzilla bug [1110845](https://bugzilla.mozilla.org/show_bug.cgi?id=1110845).

This re-introduces two-way binding to the job details pane, and as a by product also addresses the regression introduced with a stale/persistent **Job name:** field. Job name, now updates nicely in the pane as you ping around on different jobs.

All the other fields appear to be behaving properly.

Tested on Windows:
FF Release **34.0**
Chrome Latest Release **39.0.2171.95 m**

Adding @maurodoglio for review.