Currently we don't ship any plugin which integrates Qt applications with Gnome, which makes Qt application to either crash or look broken. There are two possible solutions:
- Build qtbase with -gtk3 option to get Qt's gtk platform plugin
- Build qgnomeplatform which basically does the same + few more things additionaly
I'm personally for option 2, qgnomeplatform has been written for Fedora Workstation aiming to have the best integration of Qt applications in Gnome as possible. Together with qgnomeplatform would be nice to add adwaita-qt theme as well.
Both options would require having gtk3 as dependency in our manifest, but it should be needed only during build time and once the build is done we can remove gtk libs to avoid shipping them with our runtimes.