Impove error message for "Read Quality control" in case of wrong file format

Scenario:

1. Tools->NGS data analysis->Read Quality control
2. Select "FASTQ File list" element
3. In Option panel an user can read "Input one or several files in any format. The element outputs the file(s) URL(s)." It may confuse an user.
4. Set fasta file instead of fastq: data/samples/fasta/human_T1.fa
5. Executing workflow finished with error: "Result file does not exist: D:/Temp/.bbPVsh/human_T1.fa_fastqc.html. See the log for details."
   Error log reads: "ID line didn't start with '@"
   Expected error message: "Unsupported human_T1.fa file format. Only FASTQ files are supported"