message: rounded corners for user level widget
diff: width: 110px
  height: 140px
  text-align: center
  + border-top-left-radius: $border-radius-base
  + border-bottom-left-radius: $border-radius-base
  .user-level-widget-level-digit
  padding-top: 15px
  .user-level-widget-experience
  padding: 7px
  height: 140px
  + border-top-right-radius: $border-radius-base
  + border-bottom-right-radius: $border-radius-base
  .user-level-widget-progress
  margin-top: 5px
  