Feature request: cumulative/running total delta-v in the delta-v stats window

[kerbalpeeks]

When building a craft (and making adjustments) I'd love to have a (bottom-up) running total of the delta-v in my craft. For example assuming a craft has 4 stages, I would like to see the right most column added

Stage	[...]	Vac ΔV	Cumulative Vac ΔV	Time
1	---	1800 m/s	12600 m/s	14.1s
2	---	1400 m/s	10800 m/s	14.1s
3	---	3500 m/s	9400 m/s	2m 51.5s
4	---	5900 m/s	5900 m/s	3m 05.2s

This would (amongst other things) make it really easy to see when the first stages have enough oomph to get a craft into orbit without constantly having to manually recalculate their cumulative ΔV.