reimplementaion of fix for QColorDialog on macOS Sierra bug.

doesn't use destructor because destructor causes another crash.

YACReaderLibrary/export_library_dialog.h

@@ -0,0 +1,35 @@
+#ifndef EXPORT_LIBRARY_DIALOG_H
+#define EXPORT_LIBRARY_DIALOG_H
+
+#include <QDialog>
+#include <QLabel>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QString>
+#include <QThread>
+#include <QTimer>
+#include <QProgressBar>
+
+class ExportLibraryDialog : public QDialog 
+{
+	Q_OBJECT
+public:
+		ExportLibraryDialog(QWidget * parent = 0);
+public slots:
+		void exportLibrary();
+		void findPath();
+		void close();
+private:
+		int progressCount;
+		QProgressBar *progressBar;
+		QLabel * textLabel;
+		QLineEdit * path;
+		QPushButton * find;
+		QPushButton * accept;
+		QPushButton * cancel;
+		void run();
+signals:
+		void exportPath(QString);
+};
+
+#endif