+gc-tooltip:Create get_uf_affiliation(); show SHOW in the place of status message if and

only if there is no status message, else don't show SHOW
+roster-tooltip:Show subscription only if it is different from 'both'; integrate SHOW to
last_status_time (status message alone in second line); name is now title, jid is after;
status message and show are italic everywhere; last_status_time is not showed anymore when
more than one ressource, takes too muck place(was broken anyway).
Fixes #2110 if no comment.