bugfix URL was not updated when de-selecting virus/host

src/viralhostrange/viralhostrangedb/static/js/browse.js

@@ -127,6 +127,8 @@ function host_changed(pk, checked, do_load_data){
         delete mem["host"][pk];
         if(do_load_data != false && $('select[name="host"]').parent().find('input[type="checkbox"]:checked').length==0){
             load_data();
+        }else{
+            update_get_parameter();
         }
     }
 }
@@ -181,6 +183,8 @@ function virus_changed(pk, checked, do_load_data){
         delete mem["virus"][pk];
         if(do_load_data != false && $('select[name="virus"]').parent().find('input[type="checkbox"]:checked').length==0){
             load_data();
+        }else{
+            update_get_parameter();
         }
     }
 }