Fix issue with stackable menu not dividing items correctly

src/definitions/collections/menu.less

@@ -1084,6 +1084,7 @@ Floated Menu / Item
 /* Item Icon Only */
 .ui.menu .icon.item > .icon {
   width: auto;
+  margin: 0em;
 }
 
 /*--- inverted ---*/
@@ -1129,15 +1130,18 @@ Floated Menu / Item
     Stackable
 ---------------*/
 
-
 @media only screen and (max-width: @largestMobileScreen) {
   .ui.stackable.menu {
     flex-direction: column;
   }
+  .ui.stackable.menu .item {
+    width: 100% !important;
+  }
   .ui.stackable.menu .item:before {
     position: absolute;
     content: '';
-    top: 0%;
+    top: auto;
+    bottom: 0px;
     left: 0px;
     width: 100%;
     height: @dividerSize;