[Feature request] Setting dpi value

[suuuehgi]

I would like to suggest adding support for setting the dpi value. So far -- afaik -- this is not touched.

Motivation

Personal

I use different dpi values on my laptop screen and on my external screen.
So far umonitor does the changing of the resolution but I always have to press my key combination to set the dpi value accordingly. This somehow undercuts the use of umonitor.

Abstract

Adapt to switching screens actually consists at least of setting

• the resolution and
• the scaling factor (dpi) that relates the resolution to the actual physical size of the screen.

Not having to touch the dpi value is actually the special case of changing the resolution on the same screen or by coincidence having two different screens with comparable pixel densities.

Thanks a lot!