BW Timeout/Lock based off of last use of mouse vs time

I like that BW can lock after a certain amount of time…

Problem is-- i can be on the computer working and BW will lock up cause the time has passed since last login…

Solution = To have the Logout be from the last from mouse use or keyboard press… This way i can login-- use my computer and BW though my session… Then after i walk away from my computer and the keyboard/mouse hasnt been used for x minutes-- BW locks …