change css class name for horizontally scrollable table

layouts/shortcodes/csv-table.html

@@ -4,7 +4,7 @@
 
 
 
-<div class="custom-table-1" >
+<div class="custom-table-horizontal-scroll" >
 <table class="sortable">
   {{ with $caption }}<caption>{{ . }}</caption>{{ end }}
   {{ if $useHeaderRow }}

static/custom.css

-table {
+.custom-table-horizontal-scroll {
     overflow-x: scroll;
     overflow-y: hidden;
 }