[LoTW] Remove unneeded margin at the bottom of the table

assets/css/general.css

@@ -515,4 +515,8 @@ div#station_logbooks_linked_table_paginate {
 
 .previous-qsos table {
     margin-bottom: 0px;
+}
+
+.lotw-cert-list table {
+    margin-bottom: 0px;
 }