DPI Bitmap Scaling Windows / Linux differ

[lordfolken]

XCSoar versions having and not having the problem

bad: current head
bad: v7.41

System information

Linux Debian Bookworm
Wine64 7.13

Steps to reproduce the behavior

Start both Linux and windows version with dpi switch --dpi=300x300

Expected behavior

Scaling of Icons should be the same on both platforms.

Actual behavior

Windows scales with a different factor and is larger than the Linux build

This seems to apply to bitmaps only. The landable icon is the same scale.