Provide a way to get back to home screen easily during first session

The Home screen is important to new users - how do we provide a way back to it easily? (Today, once you've started or joined a room it's hard to find it again)

@niquewoodhouse Is there something we can provide in-prod that gives easy access back to "home" for new users? We may have to consider if this impacts all users or not... One way @kittykat suggested was to have the home screen show up when a user clicks on Home meta-space. WDYT?