Blast warning
When searching a sequence with Blast, the minimal size of the match needs to be 7 bp to get a hit. The user might not be aware of this, so it would be useful to display a warning stating that the minimal size of the match is 7 bp. For example, it is not possible for a user to find all oligos containing a specific barcode of 6 bp or less. The warning will be useful so that the user does not interpret the "no hit found" as an indication that no oligo contains the searched barcode.
