That is a great idea, it would be a good addition to Mendix Business Modeler.
You can do a feature request in the Mendix support portal: https://support.mendix.com/
If you log a feature request there is a higher probability (if it adds significant value) that it will be considered for a future version than if you post it on the forum.
I found Mendix to be pretty good when it comes to listening to the requests of it's userbase.