MyFirstPlugin - button Project menu in Ready Api

hello,

I'm trying to create my first plugin for ReadyApi. I would like to add a button in the Project menu, only when a project is open. 

I've got the template Smartbear provided (https://github.com/SmartBear/ready-api-plugins) working and i see all kind of extra teststep/screens/buttons, but none in the project menu.

In the template is an action which suggest to add a button:

package com.smartbear.ready.plugin.template.actions;

import com.eviware.soapui.impl.wsdl.WsdlProject;
import com.eviware.soapui.plugins.ActionConfiguration;
import com.eviware.soapui.support.UISupport;
import com.eviware.soapui.support.action.support.AbstractSoapUIAction;
import com.google.inject.Inject;

@ActionConfiguration(actionGroup = "EnabledWsdlProjectActions", targetType = WsdlProject.class)
public class SampleJavaAction extends AbstractSoapUIAction<WsdlProject> {

    @Inject
    public SampleJavaAction() {
        super("Sample Java Action", "A sample action at the project level");
    }

    @Override
    public void perform(WsdlProject project, Object o) {
        UISupport.showInfoMessage("Hello from project [" + project.getName() + "]!");
    }
}

But no luck. The documentation says that actionGroup won't work in ReadyApi, see: https://support.smartbear.com/readyapi/docs/configure/plugins/annotations/actions/action.html
Is there an alternative to add a button in the Project menu?

thank you