fix: Date Column editing issue.

docs: add some examples.

lib/ui/css/variables/definition.scss

@@ -25,6 +25,7 @@
     --red-color: red;
     --title-color: #fff;
     --title-bg-color: rgb(68, 114, 196);
+    --title-ctrlbg-color: rgb(68, 114, 196);
     --hover-bg-color: #eee;
     --link-color: #1890ff;
     --secondary-link-color: #1d9ac0;