Sort, ascending/descending (feature request)

[alexhk]

I'd like to have a choice for sorting by names/dates in ascending or descending order.

In case that's already possible, I may be just too dumb to get it to work or I need more coffee in my system to figure it out.

NB: I also noticed that the sorting doesn't always match the displayed date, is this using the creating date or changing date of the file?