Merge pull request #237 from arnaudmiribel/arnaudmiribel-patch-2

Make it explicit that st.sidebar won't work in bottom extra

src/streamlit_extras/bottom_container/__init__.py

@@ -14,6 +14,9 @@
 def bottom() -> DeltaGenerator:
     """
     Insert a multi-element container that sticks to the bottom of the app.
+
+    Note that this can only be in the main body of the app, and not in
+    other parts e.g. st.sidebar
     """
     if hasattr(st, "_bottom"):
         return st._bottom