reimplementaion of fix for QColorDialog on macOS Sierra bug.

doesn't use destructor because destructor causes another crash.

YACReader/goto_flow_toolbar.h

@@ -0,0 +1,33 @@
+#ifndef GOTO_FLOW_TOOLBAR_H
+#define GOTO_FLOW_TOOLBAR_H
+
+#include <QWidget>
+
+class QLineEdit;
+class QIntValidator;
+class QPushButton;
+
+class GoToFlowToolBar : public QWidget
+{
+	Q_OBJECT
+	private:
+		QLineEdit * edit;
+		QIntValidator * v;
+		QPushButton * centerButton;
+		QPushButton * goToButton;
+		QWidget * bar;
+        void paintEvent(QPaintEvent *);
+
+	public:
+		GoToFlowToolBar(QWidget * parent = 0);
+	public slots:
+		void setPage(int pageNumber);
+		void setTop(int numPages);
+		void goTo();
+		void centerSlide();
+	signals:
+		void setCenter(unsigned int);
+		void goTo(unsigned int);
+};
+
+#endif