when a child has awaiting events, draw parent with message icon and open chat with this child contact when we dubble click on parent

re-create the actions menu only when needed: when we popup it up, and only when one account has signed in or signed out

fail with TB, instead of segfault

(gajim may die with older dbus - it is not
completely tested)

(0.23 is not supported)
get cached vcards, instead of signaling server

argument [account] returns a valid result

to be printed

This should help WMs like ion "do their thing" easier.