DropdownMenu: disable svg icon transition for better hover state

app/styles/components/dropdown-menu.scss

@@ -83,9 +83,11 @@
       height: 20px;
       width: 20px;
       margin-right: 10px;
+      transition: none;
 
       svg {
         stroke-width: 1.5;
+        transition: none;
       }
     }
   }