Assert in "Find Groups of annotated regions" dialog

Scenario:

1. Open samples/Genbank/sars.gb
2. Select Analyse->Find Annotated Regions
3. Set Region Size equals 60000
4. Click "+" and select "CDS" annotation
   Expected state: "Search" button is enabled
   Actual state: "Search" button is disabled
5. Click "+" and select "comment"
   Actual state: "Search" button is enabled
6. Click "Search" button
   Result " {1, 29751] appears in the Result part Unexpected assert: {code}

   Assertion failed: !tmp->r.contains(r) && !r.contains(tmp->r), file D:\ugene\ugene\src\plugins\annotator\src\CollocationsDialogController.cpp, line 286
   Window deactivation, no MDI context switch, window: 'NC_004718 [sars.gb]'