Error message should be more precise instead of "MrBayes tool exited with code 1"

Scenario:

1. Open COI.aln
2. Remove all sequences except last 3
3. Push Build tree button in the Option panel
4. Select MrBayes building method and push OK
   Actual: Inexact error message:

   [ERROR][18:34] Task {Calculating Phylogenetic Tree} finished with error: Subtask {MrBayes tree calculation} is failed: MrBayes tool exited with code 1
   

   Expected: More informative error message about at least 4 sequences.
   There is no error if add one more sequence.