fix select style

style/components/select.less

@@ -325,10 +325,6 @@
     .selected_icon();
   }
 
-  &--multiple &-menu-item {
-    padding: 7px 33px 7px 16px;
-  }
-
   &--multiple &-menu-item-selected {
     .selected_icon();
   }
@@ -376,11 +372,13 @@
     &-item {
       position: relative;
       display: block;
-      padding: 7px 16px;
+      padding: 7px 33px 7px 16px;
       font-weight: normal;
       color: #666;
       white-space: nowrap;
       cursor: pointer;
+      overflow: hidden;
+      text-overflow: ellipsis;
 
       &:first-child {
         border-top-left-radius: 4px;