Fix connection to KCoreDirLister::redirection() signal
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KCoreDirLister::redirection(const QUrl &, const QUrl &) has been in KIO for a long time, and both it and the other deprecated redirection(const QUrl &) signal are emitted by KCoreDirLister, hence no need for the conditional in the code; spotted by kossebau.
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Call setCurrentDirUrl() directly in the lambda, and drop the now redundant slotDirListerRedirection() slot.