Change another approach to fix #4637

avoid issues like #4750 and #4753 caused by old way

components/table/style/index.less

@@ -485,12 +485,29 @@
     overflow: scroll;
   }
 
+  // Fix https://github.com/ant-design/ant-design/issues/4637
+  // avoid column misalign in #4750 and #4753
+  &-fixed-header &-scroll {
+    position: relative;
+    border-radius: @border-radius-base @border-radius-base 0 0;
+    &:after {
+      background: @table-head-background-color;
+      position: absolute;
+      content: '0';
+      width: 18px;
+      right: 0;
+      top: 0;
+      padding: 16px 0;
+      user-select: none;
+      color: transparent;
+      border-radius: 0 @border-radius-base 0 0;
+    }
+  }
+
   &-fixed-header &-scroll &-header {
     overflow: scroll;
     padding-bottom: 20px;
     margin-bottom: -20px;
-    margin-right: -18px;
-    padding-right: 18px;
   }
 
   /* fix firefox scrollbar bug */