tree h-full 滚动条问题修复

scss/components/form/_tree.scss

@@ -7,6 +7,7 @@
 
     &.h-full {
         max-height: none;
+        overflow: visible;
     }
 
     &.no-border {

src/components/Tree.tsx

@@ -647,7 +647,9 @@ export class TreeSelector extends React.Component<
               ) : null}
               {childrenItems}
             </ul>
-          ) : !childrenItems && item.placeholder && unfolded[item[valueField]] ? (
+          ) : !childrenItems &&
+            item.placeholder &&
+            unfolded[item[valueField]] ? (
             <ul className={cx('Tree-sublist')}>
               <li className={cx('Tree-item')}>
                 <div className={cx('Tree-placeholder')}>{item.placeholder}</div>