Fix style of search input in select

style/components/select.less

@@ -425,14 +425,14 @@
     display: block;
     padding: 4px;
     .@{select-prefix-cls}-search__field__placeholder {
-      left: 4px;
+      left: 7px;
       top: 5px;
     }
     .@{select-prefix-cls}-search__field__wrap {
       width: 100%;
     }
     .@{select-prefix-cls}-search__field {
-      padding: 4px;
+      padding: 4px 7px;
       width: 100%;
       box-sizing: border-box;
       border: 1px solid #d9d9d9;