Version:           git-latest (using Devel) 
OS:                Linux

When reconnecting to an account which has being used to participate in a group chat previously, the group chat remains offline and is not being reconnected automatically.

Reproducible: Always

Steps to Reproduce:
→ Open Contact List
→ Set presence to Available/Online
→ Use "Join chat room" to join an XMPP group chat
→ Set presence to Offline
→ Set presence to Online

Actual Results:  
→ The presence icon of the group chat remains "Offline"
→ No new messages are shown in the group chat
→ The group chat remains offline, although the account which has been used to connect to this group chat is online again

Expected Results:  
→ The group chat should reconnect automatically as soon as the account's connection status isn't "Offline" anymore

Maybe the auto-rejoin of group chats could be made optional (but enabled by default) through some configuration options.