Check dependency on a dashboard before deleting a module

I have been cleanning up a model and deleting modules I thought I did not need. I was doing it based on the field "Referenced By" however, this field only considers module references. 

I would like to suggest "Referenced By" includes everywhere where a module is used, for instance, dashbboards. 

This way, someone cannot delete a module that is in use by a dashboard.

thanks, Leo