Allow Filtering report columns/metrics for Limits & Ranges

To allow more effective analysis, reporting and dashboarding, allow us to filter report columns/metrics by settng value limits or ranges. 

Example: Looking at Bounce Rate on Entry Pages with Visits also as a metric, let us set the limit on the Visits column to > 1000 - so we don't see all the very low volume and low frequency pages and instead see the most valuable items to focus on.

Should allow Less Than, Greater Than, Equal, and Ranges on any column in a report.