an option for "show only active tickets" In ticket filter

Project:ProjectPier
Version:0.8.8-stable
Component:User interface
Category:feature request
Priority:normal
Assigned:Unassigned
Status:new
Description

when all tickets are shown and I want to filter them, I need to look through all active states of a ticket (open, confirmed, test and confirm) to find the active tickets. It would be very nice to just klick once on "show active tickets" to see them all at once.