Add support for vertical monitor setups

[denivic]

Is your feature request related to a problem? Please describe.

When using a vertical monitor (like this) then moving elements around is impossible. Both left and right get weird values e.g. for the X coordinate, which is 2560 while the monitor is 1920x1080.

Describe the solution you'd like

I think that doing the following might do the trick:

1. Detect whether the monitor is vertical automatically (alternatively add an option to select that yourself).
2. Based on this setting either use X/Y coordinates (as well as H/W) normally or reverse the logic such that X = Y since that's the case for a comparable experience on a vertical monitor setup.

Describe alternatives you've considered

I have not considered any.