Steps to reproduce:
1. Open COI.aln
2. Open Highlighting OP
3. Select Custom color scheme
4. Open Settings->Preferences->Alignment Color Scheme
5. Change color of Custom color scheme and click ok
Expected state: Dialog Application Settings closed, new colors applied for opened MSA.
Current state: Program crashed.
Crash report: http://ugene.net/ugenecrashes/index.php?id=8974