Persistent store saved prompts

[gerritjanf]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Right now the saved prompts are stored in the LocalStorage of the browser. Meaning that the prompts saved are not persistent on multiple browsers. As someone that uses multiple systems to work on things it would be nice to have the saved prompts stored in a way they persist. My interpretation for the playground is to iterate prompts as i go along and being able to store some of them long-ish term is useful to me.

Describe alternatives you've considered
Only alternative would be to save them outside the application.