Restored old behavior accidentally removed in
1ae07b93d8 (diff-e353fab8bea58b8746ec68c83aa39b36L48)
The server only remembers the most recent presence status update per
device. Meaning that, for instance, if the user only uses one client and
that client's last status update was IDLE, then the server only knows
that, doesn't know anything about the user's last ACTIVE time. Thus the
"active_timestamp" the server will serve about this user to the webapp
will be "undefined".
The old behavior was that for the sake of the "Last active: x ago"
status in buddy list popover, the latest status timestamp was used,
whether IDLE or ACTIVE.
The change linked about changed that to only pay attention to
ACTIVE. Thus, if the server doesn't remember any ACTIVE statuses, webapp
would show "Last active: More than 2 weeks ago", which was incorrect.
We restore the old behavior and further improvements can be made on top
of this.
88d501515e