[calamares] Fix test-loader for modules after ViewManager API

- The ViewManager needs to be told when loading is done now (because of
  the quit-at-end settings)

See 7393198f7b

src/calamares/testmain.cpp

@@ -229,7 +229,7 @@ main( int argc, char* argv[] )
     std::unique_ptr< Calamares::JobQueue > jobqueue_p( new Calamares::JobQueue( nullptr ) );
     QMainWindow* mw = nullptr;
 
-    auto gs = jobqueue_p->globalStorage();
+    auto* gs = jobqueue_p->globalStorage();
     if ( !module.globalConfigFile().isEmpty() )
     {
         gs->loadYaml( module.globalConfigFile() );
@@ -241,7 +241,6 @@ main( int argc, char* argv[] )
         gs->insert( "localeConf", vm );
     }
 
-
     cDebug() << "Calamares module-loader testing" << module.moduleName();
     Calamares::Module* m = load_module( module );
     if ( !m )
@@ -273,7 +272,9 @@ main( int argc, char* argv[] )
 
     if ( mw )
     {
-        QWidget* w = Calamares::ViewManager::instance()->currentStep()->widget();
+        auto* vm = Calamares::ViewManager::instance();
+        vm->onInitComplete();
+        QWidget* w = vm->currentStep()->widget();
         w->setParent( mw );
         mw->setCentralWidget( w );
         w->show();