Crash in "Import Bam File" dialog if set input file equal destination file

Scenario:

1. Open ..\samples\Assembly\chrM.sorted.bam
2. "Import Bam File" dialog appears
3. Set destination url equal to the same as input url: ..\samples\Assembly\chrM.sorted.bam
4. Push Import button
5. "Import Bam File" dialog appears with 3 buttons: Replace Append Cancel and message
   that Destination file is already exists. See attachment.
6. Crash if push Replace