chat room user list display when not scroll needed

public_new/js/views/chats/chat-room.js

@@ -49,6 +49,12 @@ ChatRoom.loadNewMessage = async function () {
   });
 };
 
+document.addEventListener("readystatechange", () => {
+  if (document.readyState == "complete") {
+    $("#chat_room .user_list").removeClass("hide");
+  }
+});
+
 document.addEventListener("DOMContentLoaded", function () {
   // 検索イベントバインディング
   ChatRoom.bindSearchUI();