Improve sortable.js to work with BFA table (#3125)

* Improve sortable.js to work with BFA table

The Failure Cause Management table generated by the Build Failure
Analyzer
plugin (<https://wiki.jenkins.io/display/JENKINS/Build+Failure+Analyzer>)
doesn't render dates in a manner that sortable.js can recognize. This
commit improves the matching and sorting for date-like strings to
accommodate a broader variety of date/time strings, and uses the js Date
class to ensure accurate greater/equal/less than results.

* Remove commented patterns in sortable.js