Allow us to enter just the collection ID
Either use a multiline textbox or comma delimited entry so multiple collections can be added
Have Generate perform the actions that Navigate does
Prompt the user to save the file rather than copying it out of a text box.
This could be a handy tool for people who like having a lot of things on the server.
I posted a script to simply let you manage workshop content for your server with only steam (insert collection ID into script, never touch the script again and just use steam to manage your collection) awhile back.
[editline]7th February 2014[/editline]
just plop that into autorun/server/workshopgenerator.lua (combine the two code boxes into one file, in order)
remember to change some_id_here near the bottom of the file to a steam collection ID