1.McuClient.js修改登录时的用户名称，修改之后名字可以更改为最新

@@ -339,9 +339,7 @@ export default class MessageEntrance extends Emiter {
             return;
         }
 
-        if (GlobalConfig.userName == null || GlobalConfig.userName == "") {
-            GlobalConfig.userName = _param.userName;
-        }
+        GlobalConfig.userName = _param.userName||GlobalConfig.userName;//以登陆时的名字为主，登陆之前可以修改名字
         GlobalConfig.autoLogin=_param.autoLogin||"";
         GlobalConfig.password = _param.password || "";
         GlobalConfig.hasCamera = (typeof  _param.hasCamera == "boolean") ? _param.hasCamera : false;