1. Open COI.aln
2. Use context menu
Expected state: "Build phylogenetic tree" dialog has been appeared
3. Run "Phylip Neighbor Joining" with default parameters
Expected state: tree view has been appeared
4. Press refresh tree button on the tree's toolbar
Expected state: "Calculating Phylogenetic Tree" task has been started
5. Close the tree view while the task is perfrormed
Bug state: UGENE crashes