Make it run with Qt6

This is a huge commit. Changes:
* Obviously, make it compile
* Make it run (only scarcely tested)
* get rid of most of clang's warnings

Let's see what surprises are in store...

1 files changed, 1 insertions, 1 deletions

diff --git a/copyworker.h b/copyworker.h
index 165f59b..bf477e1 100644
--- a/copyworker.h
+++ b/copyworker.h
@@ -34,7 +34,7 @@ class CopyWorker : public QThread {
         void file(QString);
 
     private:
-        QList<QPair<QString, QString> > mFiles;
+        QList<std::pair<QString, QString> > mFiles;
         QHash<QString, QList<QVariant> > mData;
         QMutex mSourceMx;
         int mMax;