it is possible to configure time remaining on the display 
Yes, you can.
The two attached files either enable or disable this feature.
They can be run from a USB drive.
Knowing Dune this is a trial implementation. It may have side effects or not work as it should yet.
But installed it myself and the DSF's work on my Real Vision (4-digit small display) for both Movies and Music.
Next FW version will most likely include it.
@andys which model Dune do you own? Already tried the DSF?