Errorhandling on joining a members only muc

[mightymop]

Expected behavior

If a occupant tries to join a member only muc and is not on the member list, the chatbox should not be opened.
The ui should alert the user that he can not join because he is not a member.

Actual behavior

The muc is added to the roster and saved in storage even he is not a member. Furthermore the chatboxwindow is opened
and the user is able to write text, but of course the messages never arrive in the muc, but the ui shows that messages are sent.

Steps to reproduce the behavior

1. login to server
2. try joining a member only muc room
3. ...

Environment

• JSXC version: 4.2
• Host system and version: self hostet
• Browser vendor and version: chrome, firefox,...
• Any browser plugins enabled? no
• XMPP server vendor and version: openfire 4.6
• Is your XMPP server working with other clients as expected? yes, converse shows the error and denies muc join

Logs

Javascript

JSXC

[Debug] onPresence 
<presence to="mops@mopsdom.de/jsxc-cb681e88" from="test@conference.mopsdom.de/mops" type="error" xmlns="jabber:client">
Log.ts:102
[Error] [XMPP] auth, 407, registration-required, This is a member-only room. Membership is required.

XMPP

Host