Change distrib genomic

Add the distribution and the exemple of genomic locus for system that did not have one. Modification of the other distribution with the new version of DefenseFinder. Modification of the example of genomic locus with defense system and integrase in the locus.

content/4.refseq.md

 ---
 title: RefSeq DB
 layout: db
-navigation: true
+navigation: 
+  icon: "mdi-database"
 ---