The toolbar chatbot needs to be able to clear threads

Problem/Motivation

The current iteration of the Toolbar chatbot does not have a way of clearing the sessions you currently are on. This should be possible, so you can for instance add an entity, visit the entity and continue asking for changes. A chatbot with to long sessions will cost much, have performance issues, have reliability issues even with short term memory.

Steps to reproduce (required for bugs, but not feature requests)

• Setup an assistant that keeps threads.
• Turn on the chatbot in assistant mode.
• Try talking to the chatbot.
• Try removing the session.
• Reload.
• Try continuing the session.

Proposed resolution

• Come up with an UI element for the chatbot to clear the current session.
• Implement the possibility to clear the session.
• (optional) Hide the UI element when no session is needed.