修复select组件在mode为multiple或tags时，下拉选项为空时样式没有居中问题

tianxing0923 · web-flow · commit 7a03f5643919 · 2019-11-20T17:56:09.000+08:00
外层的.ant-select-dropdown-menu-item样式设置了padding-right:@control-padding-horizontal + 20，得到padding的值为5px 32px 5px 12px，所以里层的.ant-empty-small的样式margin-left不需要加上@control-padding-horizontal
diff --git a/components/empty/style/index.less b/components/empty/style/index.less
@@ -47,6 +47,6 @@
 // Patch for popup adjust
 .@{ant-prefix}-select-dropdown--multiple .@{ant-prefix}-select-dropdown-menu-item {
   .@{empty-prefix-cls}-small {
-    margin-left: @control-padding-horizontal + 20;
+    margin-left: 20;
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -47,6 +47,6 @@`
`47`	`47`	`// Patch for popup adjust`
`48`	`48`	`.@{ant-prefix}-select-dropdown--multiple .@{ant-prefix}-select-dropdown-menu-item {`
`49`	`49`	`.@{empty-prefix-cls}-small {`
`50`		`- margin-left: @control-padding-horizontal + 20;`
	`50`	`+ margin-left: 20;`
`51`	`51`	`}`
`52`	`52`	`}`