优化样式

static/css/jstree.css

@@ -189,12 +189,12 @@
     min-width: 30px;
 }
 .jstree-default .jstree-node {
-    min-height: 30px;
-    line-height: 30px;
-    margin-left: 30px;
-    min-width: 30px;
+    min-height: 20px;
+    line-height: 20px;
+    margin-left: 20px;
+    min-width: 20px;
 }
 .jstree-default .jstree-anchor {
     line-height: 30px;
     height: 30px;
-}
+}