1.46.0 : Horizontal scrollbar appears when displaying a dataframe and a button in a form

[phoenix1790]

With Streamlit 1.46.0 and Python 3.13, a horizontal scrollbar is shown when a simple dataframe and a form submit button are displayed together. It seems to occur only when the form border is hidden. Here is a minimum reproducible example:

import streamlit as st
import pandas as pd

data = {'Name': ['Tom', 'nick', 'krish', 'jack'],
        'Age': [20, 21, 19, 18]}

df = pd.DataFrame(data)

with st.form(key='prediction_form', border=False):
    st.dataframe(df)
    button = st.form_submit_button('Button')

[phoenix1790]

This issue seems to be fixed in 1.46.1.