* increase signal granularity
* reduce state in GroupChatForm
* remove differentiation of "joined" and "online" peers, it doesn't exist in toxcore and can't be tracked reliably in qTox
* add system message when peer name changes, even if due to alias
* add system message when self name changes, for clarity
Caused race where peer plays audio, then is removed from group, then we
process audio played signal and lookup their peerId in core where it
doesn't exist. Now Group will effectively contain the peer until the
peer list changed slot is processed.
Partial fix for #5511
Fix#4800.
In old implementation after Core title change notification, Group
updates self name and emit signal, core as subscribed on this signal and try to
change title twice.
In new implementation was added new signal to Group:
1. To notify core about user changes.
2. To notify views about core changes.
Revert needed, since otherwise there is no way to do automatic sorting
of includes.
Also reverted change to the docs, as leaving it would make incorrect
docs.
In case of conflicts, includes were sorted according to the coding
standards from #3839.
This reverts commit b4a9f04f92.
This reverts commit 5921122960.
qTox will automatically import the old history on startup.
This new database code is much more robust.
It is very resilient and will not corrupt or disappear after a crash or
power failure, unlike the old code.
The on-disk database format is also much more compact now.
The database sync option in the advanced settings has been removed,
we know run many database operations asynchronously so performance
should not be a problem anymore, but we always ensure resiliency
in case of abrupt termination, so there is no tradeoff anymore.