Change 7 day timeframe to be consistent with industry standard

Change the "7 days ago" in a contact group or sales log to be consistent with how other industries define it (e.g. Google Analytics, Facebook reports)

In Ontraport the timeframe "7 days ago"  includes the current day which is then 8 days. Industry-standard is to exclude the current day.

This causes a problem for us when generating and comparing stats. This is also a problem when creating contact groups accurately.