Changes the clone pattern method name

- Changes method name from cloneBBTrackPattern to clonePattern
- Small fix on the comments
- Adds a TODO comment regarding reusing the code from TrackOperationsWidget as a reference, so we can later figure out a way to not repeat the code

include/BBEditor.h

@@ -86,7 +86,7 @@ public slots:
 	void removeSteps();
 	void addSampleTrack();
 	void addAutomationTrack();
-	void cloneBBTrackPattern();
+	void clonePattern();
 
 protected slots:
 	void dropEvent(QDropEvent * de ) override;