[rOOt & Asterix] use get_uf_activity/mood to translate them. store subactivities according to selected activity. fixes #3809

new one). Fixes #3739.

Make nick cycle works with spaces in nicks, fix a possible bug if gc_refer_to_nick_char is not ",". Fixes #3810.

* Make usage of history_window (hopefully) more straight forward. (widget placement, focus, shown nicks, completion...)
* Kill two bugs where wrong nicknames were shown in chathistory and results window.
* Rename functions to make clear that their are intended for private usage only.

Continue to check message for HL words after we found one that could be only the beginning of another real word.

roster : Fix resource problem, gajim.contacts.get_contact() can return first contact instead of specified resource. Fixes #3789.