JsonWizard: Make sure to open files as the last thing

Make sure to open files only after last touches were applied by
the wizard.

Change-Id: I0da8b49ebe58b0516fa44ef7b0472cce20a5936f
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp

@@ -181,6 +181,13 @@ void JsonWizard::accept()
         return;
     }
     emit filesReady(m_files);
+    if (!JsonWizardGenerator::allDone(this, &list, &errorMessage)) {
+        if (!errorMessage.isEmpty())
+            QMessageBox::warning(this, tr("Failed to Open Files"), errorMessage);
+        return;
+    }
+
+    emit allDone(m_files);
 }
 
 } // namespace ProjectExplorer