Separating icon vs text click for treetable drop down

**Currently**
When clicking on a table row, the treemap updates and the table expands.

**Want**
When clicking on the arrow (expand) icon, the table should expand but the treemap should NOT update. When clicking any other part of the row, the treemap should update and the table should expand.

issue 中没有指定文件或测试。首先在 DevTools UI 中定位 treetable 行和 expand-icon 的点击处理，然后验证点击图标会展开但不会更新 treemap，而点击其他行时会执行这两个操作。

由索引模型根据 Issue 内容生成。