Longer login before being kicked out

It would be awesome if I didn't have to log in after every 5 - 10 minutes of inactivity.  Could we have the login last 24 hours?  Or better yet, let the admin pick their login duration?  The only place I log in from is my office and nobody else comes in here ... so having to log in 5 or 6 times a day is rather tedious.

Thank you!