Provide summary of settings in vertical tab on entity forms

The module already has some code for this, but the DOM structure changed and it no longer applies. So this is a bug report instead of a feature request.

Actually the existing code is for the entity object edit form, e.g. node edit, not the entity bundle edit form.

This adds the necessary JS and tweaks the form's DOM slightly to make the JS less insane.

Some code to help identify whether the 'Provide default panel' and 'Allow panel choice' options are selected:

        var name = $(this).attr('name').replace(/panelizer\[view modes\]\[(.*)\]\[status\]/, "$1");
        alert(name);
        alert($('input[name*="view modes"][name*=' + name + '][name*=default]:checked', context).length);
        alert($('input[name*="view modes"][name*=' + name + '][name*=choice]:checked', context).length);

Lets see if I can kick the automated tests into gear.

I tested it out on a plain sandbox in addition to a fully loaded site, it worked fine in both so I committed it.