NonModalConfirmationDialog and ConfirmationDialognow automaticaly close window on ok or cancel. fixes #3486

Add global search to history_viewer. Minor GUI improvements. Fix nasty bug: history_window was adding unexisting jids to logs.db, when it was tried to view their history.

handle - in version name. It's not taken into account for config file updates and caps. fixes #3011. svn version is not 0.11.2.0-svn