Add new CSS class 'qfq-sticky-element' - to stick individual elements

less/qfq-bs.css.less

@@ -825,6 +825,7 @@ legend {
 }
 
 thead.qfq-sticky th, thead.qfq-sticky td {
+  position: -webkit-sticky; /* Safari */
   position: sticky;
   top: 0;
   background-color: white;
@@ -837,4 +838,10 @@ thead.qfq-sticky td {
 
 .dropdown-menu {
   z-index: 1060;
-}
\ No newline at end of file
+}
+
+.qfq-sticky-element {
+  position: -webkit-sticky; /* Safari */
+  position: sticky;
+  top: 0;
+}