Scenario to reproduce:
- Open "data/samples/CLUSTALW/COI.aln.
- Select an area: take first 8 sequences an a region (2..12).
- Click "Export as image" button in the toolbar.
- Click "Select" button, use predefined selection. Check "Include consensus" option. Accept the dialog.
Current state: see an attached screenshot. Some consensus characters are incorrect (e.g. 11).