- Stop saving avatars of participants without their resource.
- Complement of [7927], don't save sha before avatar. Really fix #2956
- Don't save sha if avatar not readable.

Thanks "localhost".

we can now remove a contact from not in roster group which has unread events. there are just removed. fixes #2888

[Michal Vaner] add ability to send several ip when we do file transfers, and send all local IPs. fixes #2953

don't scroll to end each time we press a key in message textview, but only when scrollbar appear. fixes #2944