This was never batching, ever. Pointless memory overhead.
Also renames test scene to more appropriate name.
Fix WaveOverlayContainer being always present
Re-use the back button game-wide Co-authored-by: Dean Herbert <pe@ppy.sh>
Reduce size of dropdown chevron Co-authored-by: Dan Balasescu <1329837+smoogipoo@users.noreply.github.com>