vt7: ModComments::addWidgetTo/removeWidgetFrom need to call setRelatedList/unsetRelatedList

In the migration script 660_to_700.php around lines 395 - 413 is a routine that created RelatedLists for any module which already has a relationship to ModComments. This gets you the tab in Detail View to see All Comments.

However, if you use the ModComments::addWidgetTo static function to add a new module to the ModComments relationship, you get the widget but you do not get the related list. This actually breaks the link at the bottom of the Comments widget which reads "Show More" because there is no related list tab for it to load...

A simple one liner like:

$module->setRelatedList($modCommentsModule, 'ModComments', array('',), 'get_comments');

in the ModComments class file would do it. Along with the corresponding unsetRelatedList() call in the removeWidgetFrom() method.