[PEP] Restore our pep state
When connecting, we should request our pep nodes and store what we get in connection.foo.
We also need to update our contact instance for account tooltips. RosterWindow.on_roster_treeview_motion_notify_event is doing obscure things there. (I only had a quick look...)
We need this to always show correct tooltips and restore our current pepstate in mood/activity windows.