Provide an interface for selecting which script file to apply to any given automation, rather than writing out the file by name

Things to think about: 

• How does this handle script roots
• How can we ensure that only groovy files are shown in this menu
• How can we make it easy to see what the contents of the file actually are? 

This does not necessarily need to keep the same structure with tabs of the File/Console 

You do not need to worry about saving files to the FS in this iteration