Clean connection waiting list after connection attempt with a non existing JIDcreated
The maxRetries for XMPP connection has been set to 2, so there are 3 tries in total. It solved a bug where the attempts were repeated indefinitely and thus blocking everything. Now it's not blocking everything, but the account which could not connect is still blocked because the Bus doesn't get any answer after the third connection attempt failed. This is not critical because the XMPP account which has a problem probably doesn't exist, but still it would be better to display a proper error message and clean the process. For now, the first time you try to login in Libervia with a wrong JID, you will get a normal error message (wrong login and/or password), but then if you click again you never get an answer or you get the "ALREADY WAITING" error.