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

1
.claro .dijitTitlePaneRtl .dijitClosed .dijitArrowNode,.claro .dijitFieldsetRtl .dijitFieldsetTitleClosed .dijitArrowNode {background-position: -7px 0;}