reimplementaion of fix for QColorDialog on macOS Sierra bug.

doesn't use destructor because destructor causes another crash.

YACReaderLibrary/no_libraries_widget.h

@@ -0,0 +1,19 @@
+#ifndef NO_LIBRARIES_WIDGET_H
+#define NO_LIBRARIES_WIDGET_H
+
+#include <QWidget>
+
+class NoLibrariesWidget : public QWidget
+{
+	Q_OBJECT
+public:
+	explicit NoLibrariesWidget(QWidget *parent = 0);
+	
+signals:
+	void createNewLibrary();
+	void addExistingLibrary();
+public slots:
+	
+};
+
+#endif // NO_LIBRARIES_WIDGET_H