Make results table actions sticky to top

src/Admin.css

@@ -38,6 +38,12 @@
   overflow-y: scroll;
 }
 
+.vom-results-table-actions {
+  position: sticky;
+  top: 0px;
+  background: white;
+}
+
 .vom-results-table-actions .badge {
   margin-left: 0.5rem;
 }