ISTWCMS-6110: make the mark element more or less match the front end

css/uw_ckeditor.css

@@ -139,6 +139,15 @@ li > *:last-child {
   margin-bottom: 0;
 }
 
+mark {
+  background: #ffea30;
+  color: #000000;
+  padding: 0.063rem 0.125rem;
+  /* Ensure the padding shows when there are line breaks. */
+  -webkit-box-decoration-break: clone;
+  box-decoration-break: clone;
+}
+
 @media print {
   li {
     page-break-inside: avoid;