title: Plotly Dash: dcc.RadioItems vertical alignment
body: <p>I would like to align vertically all options of a <code>dash_core_components.RadioItems</code>.<br>
  According to the <a href="https://dash.plotly.com/dash-core-components/radioitems" rel="nofollow noreferrer">dash documentation</a>, the default behavior should include a vertical alignment of the <code>RadioItems</code> options. If you wanted to align the options horizontally, you would have to specify:</p>
  
  <pre><code>labelStyle={'display': 'inline-block'}
  </code></pre>
  
  <p>On the contrary, as default behavior I get a horizontal alignment and I don't know what to specify as the <code>display</code> item to get a vertical alignment of the <code>RadioItems</code> options.<br>
  Here my attempt until now:</p>
  
  <pre><code>import dash
  import dash_core_components as dcc
  import dash_html_components as html
  from dash.dependencies import Input, Output
  
  app = dash.Dash()
  
  app.layout = html.Div([dcc.RadioItems(id = 'input-radio-button',
                                        options = [dict(label = 'A', value = 'A'),
                                                   dict(label = 'B', value = 'B')],
                                        value = 'A'),
                         html.P(id = 'output-text')])
  
  
  @app.callback(Output('output-text', 'children'),
                [Input('input-radio-button', 'value')])
  def update_graph(value):
      return f'The selected value is {value}'
  
  
  if __name__ == "__main__":
      app.run_server()
  </code></pre>
  
  <p>What I get:</p>
  
  <p><a href="https://i.stack.imgur.com/opDYS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/opDYS.png" alt="enter image description here"></a></p>
  
  <p>I would like to get a results like this (image manually edited):<br>
  <a href="https://i.stack.imgur.com/VguYP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VguYP.png" alt="enter image description here"></a></p>
  
  <p>I found <a href="https://community.plotly.com/t/has-something-changed-with-radio-items-orientation/23492" rel="nofollow noreferrer">this reference</a> where this problem is mentioned. There, it is proposed to solve it by referring to an external stylesheet. I would like, if possible, to avoid this turnaround and solve it by specifying the correct option within the definition of the <code>RadioItems</code> element.</p>
  
  <p>Version info:</p>
  
  <pre><code>Python  3.7.0
  dash    1.12.0
  plotly  4.7.0
  </code></pre>