Script server: make scripts more easily reusable

As a user, I would like to be able to reuse saved scripts more easily. Currently adding a script to the queue requires you to go through the file browsing dialogue every time. I propose maintaining a list of loaded files for easy access, see mockup below:


Start by locating the Script server queue flow and the file-browsing dialog used when adding a script. Compare the current flow with the linked mockup; done means previously loaded scripts are listed and can be added to the queue without browsing for the file again.

Scritto dal modello di indicizzazione a partire dal testo della issue.