Restrict navigation to root directory

app.py

@@ -89,6 +89,7 @@ def _(mo):
     dataset = mo.ui.file_browser(
         filetypes=[".h5", ".h50", ".h51", ".h52", ".h53", ".h54", ".h55"],
         multiple=False,
+        restrict_navigation=True
     )
     mo.md(f"Please select the dataset file (h5 file) \n{dataset}")
     return (dataset,)