Merge pull request #3 from duteng/master

Fix "firefox float right problem"

js/dropdown-item.jade

@@ -1,8 +1,7 @@
 li.dropdown-item(role='presentation', class=classes, id=id)
   a(role='menuitem')
+    if iconRight
+      span.icon-right(class=iconRight)
     if iconLeft
       span.icon-left(class=iconLeft)
     span.text=text
-    if iconRight
-      span.icon-right(class=iconRight)
-