Fixed the "highlight notes in arpeggios" function to take the arpeggios' difficulty level into account.
Fixed the "highlight notes in arpeggios" function to take the arpeggios' difficulty level into account.

git-svn-id: 80300035c0945e1dead713df30ec139394dadc1f@1169 1b2aedea-9eff-cdc0-263b-b87a75789507

cincodenada/editor-on-fire,cincodenada/editor-on-fire,cincodenada/editor-on-fire,cincodenada/editor-on-fire