Merge pull request #407 from coderhaoxin/fix-menu-z-index

fix menu z-index, to be smaller than 1000 (dialog, mask, modal)

style/components/menu.less

@@ -5,7 +5,7 @@
   margin-bottom: 0;
   padding-left: 0; // Override default ul/ol
   list-style: none;
-  z-index: 1001;
+  z-index: 999;
   border: 1px solid #d9d9d9;
   box-shadow: @overlay-shadow;
   border-radius: @border-radius-base;