title: How can I disable many2many_tags widget from having create and edit?
body: <p>I have something like this:</p>
  
  <pre><code>&lt;tree string="Lines" editable="bottom"&gt;
   &lt;field name="required_weekday" widget="many2many_tags"/&gt;
  &lt;/tree&gt;
  </code></pre>
  
  <p>When I edit the <code>many2many_tags</code> has a create and edit option. But since I'm dealing with weekdays I just have a pre-populated model and there's no need to add additional ones. How can I disable create and edit?</p>