Log: Sorting users by amount not working

[mobergmann]

Apparently sorting the users doesn't work:

I had a peek at the source code and apparently the sorting function is broken. To be specific, the lines

let lhs_sum = lhs.activities.reduce((a, b) => a.amount + b.amount, 0);
let rhs_sum = rhs.activities.reduce((a, b) => a.amount + b.amount, 0);

return NaN and the comparison of NaN values is not utile when sorting.