This is geared more at the power users, the one who are designing complex forms with lots of custom javascript or CSS. 

With the plethora of great code editors out there, I wonder if it would be feasible to add an option to have a managed "Forms Assets" folder that would create a folder for each form with blank formname.js and formname.css files. 

Having these files in a standard place could make it easier to use a 3rd party editor for more complex form design and testing. 

You can certainly create these and call them up by using the appropriate .getScript() commands but then you need to manae the files on the server yourself. 

I think it would be best to have Laserfiche manage these files as you could place the script and any local assets for that form in one place that could then potentially be exported and moved to other forms servers with minimal effort.