Feature request: Calculate average in-system duration

[DynV]

When I first played this game I picked the most paying jobs and on the way to them picked other with slight detours. Well... It wasn't long that I ran out of time considering the in-system transport time. Nowadays I rarely make that mistake, however to every-time I spot something interesting I have to switch to System overview then find out how many AU I have to approximately travel. It would be nice if there was a way for it to be calculated before I agree to the mission; something like:

Average in-system travel duration: 20 hours.

Thank you for your consideration