The Unipept API has an internal limit of reporting 10 000 matched proteins for a peptide. For some peptides, this limit is effectively reached and the web app shows that 10 000 protein matches were found (which is ok), but it doesn't mention anywhere that this actually might be more in reality and that this is simply the internal limit of Unipept that is reached.

We should explicitely report to the user that the internal limit has been reached instead of only showing the 10k matched proteins.