Bug fixes

- Fix chart in Ai want U
- Mute music on song select with Q
- Do not scroll song select background when the tab is not active
- Fix very short inputs not being recognized
- Fix sound being muted when playing the same song again
- Fix multiplayer when audio latency is set
- Fix getting stuck when imported song cannot be restarted
- Fix 2P cursor when ura is selected by both players
- Add KeyboardEvent.key to browser tests
- Separate buttons like Shift+Left into two on the How to Play page
- Change focused button on the custom songs screen to the first one available
- Add favicon to the admin page
- Display the id on the admin new song page

public/src/css/view.css

@@ -59,6 +59,9 @@ kbd{
 	line-height: 1.4;
 	white-space: nowrap;
 }
+.key-join{
+	font-size: 0.6em;
+}
 .taibtn{
 	display: inline-block;
 	background: #f6ead4;