SO: Ubuntu + Xfce (Xubuntu) 17.10

The last 2 version of Drafsight (2018 SP0 and 2018 SP1) use the same GTK+ Qt5 style from the running desktop environment.

This causes problems when:
· The GTK Theme has poor support for applications with Qt interface
· Using a Dark GTK Theme (Since some icons in DraftSight are not visible)

I tried to solve this by running DrafSight with the option "-style" + Fusion

"/opt/dassault-systemes/DraftSight/Linux/DraftSight" -style Fusion

but the font becomes very big (like ~ x1.667 bigger) than what is established in the system.

My next attempt was QT_DEVICE_PIXEL_RATIO=0 but it did not have any effect on the font sinzes

env QT_DEVICE_PIXEL_RATIO=0 "/opt/dassault-systemes/DraftSight/Linux/DraftSight" -style Fusion

The same for QT_AUTO_SCREEN_SCALE_FACTOR=0

env QT_AUTO_SCREEN_SCALE_FACTOR=0 "/opt/dassault-systemes/DraftSight/Linux/DraftSight" -style Fusion

Is there any other option to solve this? Or take my question as a feedback and maybe establish a single official theme for DraftSight.