handle correctly full_jid / jid in events (try to find one with fulljid before trying with jid). SHould fix #2414

fill disco treeview MUCH faster. (disable the search of alerady existing row before adding: This can't happen, and disable sort function while adding items). Fir #2426

before/after_time/nickname are now textviews in pref window. So that they can contacin \n and \t chars. Fixes #2206

(Undo second part of [6735])

contextmenu

(fixed bug: xml error when we get CDATA after
 initial stream header)

set a text in avatar button instead of a fake avatar when no avatar is set in profile window. For #1840