QDS-14479 relative image paths are not working

Closes QDS-14479

src/backend/main.cpp

@@ -35,6 +35,7 @@ int main(int argc, char *argv[])
     Logger::instance();
 
     qDebug() << "Starting Qt Design Viewer";
+    qputenv("QML_COMPAT_RESOLVE_URLS_ON_ASSIGNMENT", "1");
 
     QApplication app(argc, argv);
     QApplication::setOrganizationName("Qt");