What's the "Last question" reminder in the room? (Beta)

A small on-screen reminder shows the host's latest question, so a guest mid-answer doesn't lose track of what was asked. Each person turns it on for their own screen with the captions button by the settings gear, and hosts can turn it on too, just to see what's being shown to guests. It only ever shows the host's questions to the whole room, not each person's own.