Bug 296565 Make group creation an advanced option in the folder
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardNewGroupMainPage.java
}
    /**
     * Returns whether this page's controls currently all contain valid 
     * values.
     *
     * @return <code>true</code> if all controls are valid, and
     *   <code>false</code> if at least one is invalid
     */
    protected boolean validatePage() {
        boolean valid = true;
        if (!resourceGroup.areAllValuesValid()) {
            
            if (resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_RESOURCE_EMPTY
                    || resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_CONTAINER_EMPTY) {
                setMessage(resourceGroup.getProblemMessage());
                setErrorMessage(null);
            } else {
                setErrorMessage(resourceGroup.getProblemMessage());
            }
            valid = false;
        }
        
        if (valid) {
            setMessage(null);
            setErrorMessage(null);
        }
        return valid;
    }
}