Fix border radius on dropdowns in vertical menus

src/definitions/collections/menu.less

@@ -466,15 +466,16 @@
   content: "\f0da";
   margin-left: 1em;
 }
+.ui.vertical.menu .active.dropdown.item {
+  border-top-right-radius: 0em;
+  border-bottom-right-radius: 0em;
+}
 .ui.vertical.menu .dropdown.item .menu {
   top: 0% !important;
   left: 100%;
   margin: @dropdownMenuOffset 0px 0px @dropdownMenuOffset;
   box-shadow: @dropdownVerticalBoxShadow;
-}
-.ui.vertical.menu .dropdown.item.active {
-  border-top-right-radius: 0em;
-  border-bottom-right-radius: 0em;
+  border-radius: 0em @borderRadius @borderRadius @borderRadius;
 }
 .ui.vertical.menu .dropdown.item .menu .item {
   font-size: 1rem;