左侧树状图更改，及部分样式调整

shuishen

2021-06-08 23346a0c7f9eb68a999fab429355a14b592bc2f7

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<tr dojoAttachPoint="groupingNode" class="feedViewerGrouping">
    <td colspan="2" dojoAttachPoint="titleNode" class="feedViewerGroupingTitle">
    </td>
</tr>