Scenario to reproduce:
- Open "data/samples/CLUSTALW/COI.aln".
- Attach "data/samples/Newick/COI.nwk" tree to the alignment.
- Set the tree viewer line over the root node.
all sequences names in the Alignment Editor have black background.
- Collapse any node in the Tree Viewer, place the line to the right of the collapsed node.
all sequences names in the collapsed group have black background.