左侧目录树优化，及搜索部分样式调整，部分图片路径更改

shuishen

2021-06-11 95c1f10a276a69ce4fdcc72e68a35c796581d143

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<div>
  <div class="loading-container">
      <div data-dojo-attach-point="loadingNode" class="img-div">
      </div>
      <p data-dojo-attach-point="textNode"></p>
  </div>
</div>