Message can be sent after group was dissolved
During a testing session (#788 (closed)), a user reported that they were able to send a message after a group had been resolved. Another user who had the group open at the same time, did get the dialog informing him that the group had been dissolved, but the user who was writing a messaging, did not get the dialog and could still send the message.
We would need to try to reproduce this as it is possible that the dissolve notice did not arrive in time and the user could sent the message before the dissolve notice arrived.