Compile-time option to use native QtWidgets controls

[probonopd]

In helloSystem we are using still an old fork of what used to be this project under another name.

We would like to upgrade to this version.

But this version now depends on libFishUI.so and uses non-native controls for context menus:

We would like to get back the system native QtWidgets controls for e.g., context menus, like in the old version:

Is this possible?