fix: show directories with a single child in tree

Author: erezrokah

example/content/pages/index.md

@@ -85,15 +85,13 @@ const TreeNode = (props) => {
   });
 
   return sortedData.map((node) => {
-    const leaf = node.children.length <= 1 && !node.children[0]?.isDir && depth > 0;
-    if (leaf) {
+    if (!node.isDir) {
       return null;
     }
 
     const title = getNodeTitle(node);
 
-    const hasChildren = depth === 0 || node.children.some((c) => c.children.some((c) => c.isDir));
-
+    const hasChildren = depth === 0 || node.children.some((c) => c.isDir);
     return (
       <React.Fragment key={node.path}>
         <TreeNavLink

src/NestedCollection.js

@@ -121,12 +121,12 @@ export class ParentControl extends React.Component {
   }
 
   render() {
-    const { forID, classNameWrapper, setActiveStyle, setInactiveStyle } = this.props;
+    const { forID, classNameWrapper, setActiveStyle, setInactiveStyle, collection } = this.props;
 
     const fullPath = this.getFullPath();
     const parentPath = this.getParent(fullPath) || '';
     const parent = this.state.entries.find((e) => this.getPath(e.path) === parentPath);
-    const label = (parent && parent.data.title) || '';
+    const label = (parent && parent.data.title) || collection.get('label');
 
     const options = [
       {