content view - fix issue w/ deleting filters and filter rules

The logic for deleting filters, filter rules and filter rule parameters
used to be common; however, when we extended rule parameters
to support pkg versions, it no longer remained common.
Unfortunately, a regression was introduced with that work and
this commit will fix that.
content views - minor chgs to views for asset pipeline
Merge pull request #1944 from bbuckingham/fork-bug_fixes

content views - couple of small bug fixes