pmdCE: rendering conflicting layers

[bwbohl]

If the MEI has multiple layers with the same pitch and one of them is a potential start or endpoint of a slur, it might be in the background and thus the association not visible or editable in the rendering.

[bwbohl]

with the new verovio also stems will be highlighted, thus it will be easier to spot the fact; the XML Editor can then be used to edit the association.
The only problematic case will be events that are absolutely geometrical congruent in all layers…

A solution for that does not come to mind at the moment!