perf: update asset tree siderbar

Author: ibuler

src/app/elements/asset-tree/asset-tree.component.scss

@@ -141,7 +141,7 @@
 
     .tree-type-content {
       position: relative;
-      padding: 5px 10px;
+      padding: 1px;
       min-height: 40px;
       height: calc(100% - 31px);
       background-color: var(--el-asset-tree-bg-color);