DosBox developers program DosBox for free. Patches have to have game related reasons because that is the main goal of DosBox. Occasionally non game related patches are integrated if there is alot of demand but this does not happen too often.
Reasons DosBox doesn't have this implemented:
It can already be done with an unofficial patch.
There are other programs out there that are capable of doing what you want to do.
Patches integrated into DosBox have to be maintained. As DosBox grows bigger it requires more maintenance for DosBox to be compatible with all patches it integrates. This is a big job.
Potentially any patch integrated into DosBox can reduce compatibility. Since DosBox's main goal is GAME compatibility then integrating a non game related patch for people wanting to run their BUSINESS applications for FREE would not be very nice for the people who want to play games in DosBox.
DosBox devs have been burned by people who want them to integrate a feature promising to offer money, the feature gets integrated and the $$$ never appears.