Only one fingering in a chord is exported

[uliska]

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[uliska]

{
  % Chord with individual fingerings
  % only the "1" will be exported, attached to the c'
  <c'-3 g'-2 e''-1>

  % individual note with multiple fingerings
  % only the "3" will be exported
  c'-2 -3
}

The second example is clear, the function simply assigns the number to self.fingering. Instead this should be a list (although I haven't looked up how multiple fingerings are done in MusicXML).

In the first example it's on the one hand the same issue that later fingerings overwrite the earlier ones, but additionally I'm a little bit confused that in the chord the "current note" is always the first note. I would expect the fingerings to be attached to the respective chord note and not to its base. I'll have to look into this issue first.