Change format of a reloaded file

1. Open an alignment in ClustalW format (e.g. "test.aln")
2. Outside UGENE create a FASTA file with the same name as the alignment file (e.g. "test.aln", even if it is FASTA)
3. Copy the second file to replace the first one outside UGENE
4. Confirm to reload the file in UGENE

=> Unloaded file is shown, "Alignment is empty" error occurs when it is opened. This error doesn't appear if the file is just opened in UGENE.