Top 10 can show NaN

[reedy]

Noticed when reviewing #1222, but not caused by it... Presumably ue to import issues (#1197) with my current test dataset, the plane rows are messed up.

But this can also be seen on a new account (well, one with no flights) on the live site too:

This can definitely be handled much more nicely

[kil0ba]

I also faced this issue but only with top 10 by mileage, top 10 by segments works as espected.

I found it in production in my account

[reedy]

It's a bit better after destroying and recreating the database... But there's clearly some bad handling in here