hack: prevent error messages from resizing the chat box

public/trivabble.js

@@ -831,6 +831,7 @@
     }
 
     function chatMessage(sender, content) {
+        chatMessages.style.width = chatTextarea.offsetWidth + "px"; // HACK to prevent the chat box from getting too big
         const msgDom = document.createElement("div");
 
         msgDom.className = "msg";