S16051 :has selector is not supported on Firefox. The first rule treats all...

S16051 :has selector is not supported on Firefox. The first rule treats all <li> elements and the second one resets the style of active links. refs #16051

less/qfq-bs.css.less

@@ -1480,7 +1480,13 @@ input.qfq-password {
 }
 
 // gray text and corrected padding for inactive dropdown options (render mode 3)
-.dropdown-menu>li:not(:has(a)) {
+.dropdown-menu>li {
   padding: 3px 20px;
   color: gray;
+}
+
+// reset previous rule for active options
+.dropdown-menu>li>a {
+  padding: 0px 0px;
+  color: #333;
 }
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