Tossing my hat in on this as well. Super minor gripe, but it's something that's bothered me for awhile now.
Also...is it just me or is the session timeout kind of hit or miss in general? Anecdotally, I've left the Dashboard open/inactive in another tab for what I'm sure was longer than our timeout and not been prompted to re-login. I've also left the dashboard open/inactive in another tab for less than our timeout and been prompted to re-login. I'm pretty sure I've also seen one tab timeout while another tab did not.