title: insert specific tt_content element as irre ('type' => 'inline')
body: <p>I would like to insert a new specific content element as an inline element.
  The foreign table would be tt_content.</p>
  
  <p><a href="https://i.stack.imgur.com/wdTEp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wdTEp.png" alt="tt_content as irre"></a></p>
  
  <p>If I do that I am getting all the options (ctype drop down, etc.)</p>
  
  <p>Is it possible have a content element (ctype) preselected and prevent the user from changing that in the inline editing?</p>
  
  <pre><code>'children' =&gt; [
          'exclude' =&gt; 0,
          'label'   =&gt; 'LLL:Label',
          'config'  =&gt; [
              'type'          =&gt; 'inline',
              'foreign_table' =&gt; 'tt_content',
              'foreign_field' =&gt; 'parent'
          ]
      ],
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/TZqvS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TZqvS.png" alt="enter image description here"></a></p>