When the user selects bigger numbers for window scaling in the display settings for example from 1x two 1.5x the scaling actually goes down. This patch fixes this. Actually the original implementation stays true to the xrandr setting where numbers below 1 means upscaling and numbers above 1 means downscaling. But that is quite confusing for the user.
I also changed the German translation for "Scale" because I think the current translation makes not much sense.