rename Piano Roll window title on Instrument Track rename/remove

include/PianoRoll.h

@@ -384,6 +384,7 @@ private:
 
 signals:
 	void positionChanged( const MidiTime & );
+	void noValidPattern();
 
 } ;
 
@@ -427,6 +428,10 @@ public:
 signals:
 	void currentPatternChanged();
 
+
+public slots:
+	void patternRenamed();
+
 private:
 	void focusInEvent(QFocusEvent * event);