Save publish commands - Githubissues

Problem Description Some publishes might be done more than once. It is annoying to write topic and payload down all the time.

Proposed Solution Implement a handler for lists that can be loaded and broadcasted to the clients. This list would then hold various {topic, payload, broker} tuples that can be clicked. The user has to be able to modify that list.

Additional Context The list can also be modified and shared using docker mounts.