Contact list - add symbols for unsent, sent and acknowledged messages next to the time stamp
With the possibility now to export unsent messages onto a removable medium, the user may have some unsent to be exported messages in some conversations, whereas in other conversations they may have already exported all unsent messages, etc.
To make it easier for the user to see in which conversations there are unsent, sent or acknowledged messages, maybe the appropriate symbols can be added next to the timestamp for each contact in the contact list.
If done similarly as can be seen on the screenshot below, then the user would know that in the conversation with Belle, there are still messages that are not sent and some that are not acknowledged.