Sorting of date / time does not work

[WilliamLindblom]

Dates with time ( i.e. "2020-03-26 10:00:00") and only time (i.e. "10:00:00") does not work as expected. The issue is that 00 comes after 01-09.

Expected:

10:00:00
10:00:01
10:01:00
10:09:00
10:10:00

Actual:

10:01:00
10:09:00
10:10:00
10:00:00
10:00:01

[616slayer616]

I think I have a fix for that in my "fork":
616slayer616/natorder#5
Could you verify that this makes sense?