When the sort order "both" is selected, decide whether the first option should be "ascending" or "descending"

Problem/Motivation

In sort widget settings, trough the user interface you can for each sort options define which orders will be available (both, ascending or descending).
If you select "both", ascending and descending will be available but you can't decide on which one will be the first one. It's always first ascending then descending but sometimes the order way around is more suitable.

Proposed resolution

I suggest to replace option "Both" by "Both (ascending first)" and "Both (descending first)".

User interface changes