TrackContainerView: when dragging a preset file into TrackContainerView

load complete track settings rather than just track specific settings -
fixes an issue where the track name was not loaded from the dragged preset
(cherry picked from commit 5976ab5ce2)

src/gui/track_container_view.cpp

@@ -405,8 +405,7 @@ void trackContainerView::dropEvent( QDropEvent * _de )
 		instrumentTrack * it = dynamic_cast<instrumentTrack *>(
 				track::create( track::InstrumentTrack,
 								m_tc ) );
-		it->loadTrackSpecificSettings( mmp.content().firstChild().
-								toElement() );
+		it->loadSettings( mmp.content().toElement() );
 		//it->toggledInstrumentTrackButton( true );
 		_de->accept();
 	}