Fix th borders disappearing in ff and edge

qu1ck · qu1ck · commit c1a7502b64b3 · 2018-09-15T21:57:49.000-07:00
diff --git a/InteractiveHtmlBom/ibom.css b/InteractiveHtmlBom/ibom.css
@@ -151,6 +151,7 @@ canvas:active {
 
 .bom th {
   background-color: #CCCCCC;
+  background-clip: padding-box;
 }
 
 .dark .bom th {
