course: fix creating new folder for assignment in subfolder

Author: williamstein

src/packages/frontend/project/directory-selector.tsx

@@ -96,6 +96,7 @@ export default function DirectorySelector({
 
   const toggleSelection = useCallback(
     (path: string) => {
+      console.log("toggleSelection", { path });
       let x;
       if (multi) {
         if (selectedPaths.has(path)) {
@@ -475,7 +476,7 @@ function CreateDirectory({
       const actions = redux.getProjectActions(project_id);
       const fs = actions.fs(computeServerId);
       await fs.mkdir(join(path, value));
-      toggleSelection(value);
+      toggleSelection(join(path, value));
     } catch (err) {
       setError(`${err}`);
     } finally {