These are just the ones that were causing console flooding on reload in development.
* Elements in a list need a `key`
* `super()` needs to be supplied with the same props as the parent
* `<div>` (AccessibleButton) cannot be a descendant of `<p>` - this was a problem in the NewRoomIntro "Add topic" button
* `label` is a non-boolean property and cannot receive "false"
