People tend to keep to 1 persona when working with the bot,
this adds local browser memory for the last persona you interacted
with so you do not need to select it over and over again.
This is per browser, not per user memory.
Also... clean up tests so they do not need to require stubs which
were breaking the build
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Co-authored-by: Martin Brennan <martin@discourse.org>
Loïc Guitaut
Roman Rizzi
Rafael dos Santos Silva
Sam