<NME> styles.css
<BEF> .rw-virtual-list-wrapper {
  overflow: auto;
}

.rw-virtual-list.rw-list {
  overflow: visible;
  max-height: none;
  padding-top: 0;
  padding-bottom: 0;
.rw-virtual-list-fixed .rw-list-option {
  overflow: hidden;
}
  overflow: hidden;
}

.rw-list-option-loading {
  font-style: italic;
}

<MSG> add virtualized fetch callbacks

<DFF> @@ -10,3 +10,7 @@
 .rw-virtual-list-fixed .rw-list-option {
   overflow: hidden;
 }
+
+.rw-list-option-loading {
+  font-style: italic;
+}

add virtualized fetch callbacks