style(sidebar): enhance the sidebar's bottom gutter. (vuejs#129)

Author: ulivz

lib/default-theme/Sidebar.vue

@@ -88,12 +88,12 @@ function resolveOpenGroupIndex (route, items) {
  font-size 1.1em
  padding 0.5rem 0 0.5rem 1.5rem
  .sidebar-links
- margin-top 1.5rem
+ padding 1.5rem 0
 
 @media (max-width: $MQMobile)
  .sidebar
  .nav-links
  display block
  .sidebar-links
- margin-top 1rem
+ padding 1rem 0
 </style>