Travel Time instead of Arrival Time in stack popup

When you hover over a marching stack a popup shows the Arrival Time. The Arrival Time is very useful for planning arrival times for multiple units, but this is a more involved task and here I'm clicking the units and looking at the arrival times anyway. More routinely though, I just want to know the Travel Time. For example, say I know my artillery have 15 minutes until the next fire and I want to hover over approaching enemy to see its Travel Time until it reaches me. Currently, you can't do this. You have to click the enemy to see the Travel Time. It would be more useful if the popup showed the Travel Time. You can always click the unit to get the Arrival Time when you need it.