Merge pull request #1699 from curlymorphic/bbundo

Song Editor and bbEditor undo.

src/core/Track.cpp

@@ -1439,6 +1439,7 @@ void TrackContentWidget::mousePressEvent( QMouseEvent * _me )
 	else if( _me->button() == Qt::LeftButton &&
 			!m_trackView->trackContainerView()->fixedTCOs() )
 	{
+		getTrack()->addJournalCheckPoint();
 		const MidiTime pos = getPosition( _me->x() ).getTact() *
 						MidiTime::ticksPerTact();
 		TrackContentObject * tco = getTrack()->createTCO( pos );

src/tracks/Pattern.cpp

@@ -838,6 +838,7 @@ void PatternView::mousePressEvent( QMouseEvent * _me )
 		}
 		else // note at step found
 		{
+			m_pat->addJournalCheckPoint();
 			if( n->length() < 0 )
 			{
 				n->setLength( 0 );	// set note as enabled beat note