content views - add 'summary' info to filter rule list

This commit contains changes so that when a user
looks at the rule listing for a given filter, it will
provide a summary on each of the rules.

E.g.
Include Errata: Bug Fix: 04/01/2013 - 04/04/2013
Exclude Packages: xterm, dtterm
Include Errata: Security: Any date
...etc
content views - minor change to address a jeditable initialize issue