Improved Metrics Tracking for Pages

Have the ability to see stats for a given period of time from within the Pages Stats. This will be particularly helpful when split-testing pages. Right now, you can only see lifetime values for page views and conversion. And if you create a new split test page, you'll see the old metrics for previous split tests, so it's almost impossible to track these metrics without creating a new page (not ideal when sending ads to these pages). This would be HUGE!