Expand GUI for sequencing and input from file

frontend_qt4/sequencewindow.h

@@ -0,0 +1,19 @@
+#ifndef SEQUENCEWINDOW_H
+#define SEQUENCEWINDOW_H
+
+#include "ui_extSequence.h"
+
+class SequenceWindow : public QDialog, private Ui::SequenceDialog
+{
+	Q_OBJECT
+
+public:
+	SequenceWindow();
+	~SequenceWindow();
+
+private slots:
+	void quit_now();
+	void reset_preview();
+};
+
+#endif