There are already "This week/month/year" shortcuts in the statistics tab, but it would be great to add a "Last 7" and "Last 30" days (maybe even a last 365 days) so it's easy to quickly graph the latest trends and not see a lot white space when you're in the middle of the week/month/year.

Also it would be great to add an option to display a pie chart in the timesheet tab (total time vs tags).

Thanks!