D23519: chatwindow: fixed use of nonexisting signal QTabWidget::currentChanged(QWidget *)

[Dmitry Kozlov]

dmitrykozlov added a reviewer: Kopete.

REPOSITORY
  R434 Kopete

REVISION DETAIL
  https://phabricator.kde.org/D23519

To: dmitrykozlov, #kopete
Cc: kopete-devel, nchatzidakis, himanshuvishwakarma, cochise