Select: fix tags style in IE10 (#10632)

packages/theme-chalk/src/select.scss

@@ -113,6 +113,11 @@
     display: flex;
     align-items: center;
     flex-wrap: wrap;
+
+    > span {
+      display: inline-block;
+      width: 100%;
+    }
   }
 
   .el-tag__close {