Add laod overlay outside domain and class (lengend and tab) for wet-boew-geomap

Now we can load config file from outside the domain and we reapply the plugin to tabbedinterface. We need to do the same thing for datatable.

I added a class legend and tab. This is a recommandation by Pierre Dubois. Now the user does not have to create the holder for legend and tabs. If he specify those classes it will be created automatically.