Crash on exporting sequence of annotation that is out of boudaries

Scenario to reproduce:

1. Open "data/samples/Genbank/murine.gb".
2. Open "data/samples/GFF/5prime_utr_intron_A20.gff".
3. Drag and drop any annotation table object from the GFF document to the sequence.
   Expected state: you are notified, that some annotations are out of boundaries.
4. Select an annotation which is outside the sequence.
5. Call a context menu, select "Export > Export sequence of selected annotations".
6. Accept the export dialog.
   Current state: UGENE crashes.
   Expected state An error notification appears:

   Sequences of the selected annotations can't be exported. At least one of the annotations is out of boundaries.