title: Typo3/TCA create new tab with fields of another tab inside
body: <p>I need some help in Typo3/TCA.<br>
  Im trying to modify the backend layout of an extension, but cant get it to work.</p>
  
  <p>I try to make the context of "Firma" as a new tab (see image).</p>
  
  <p><img src="https://i.stack.imgur.com/g0u0g.png" alt="Firma1"></p>
  
  <p>I fugured out that the context of "Firma" is defined in <code>tca.php</code> in <code>$TCA['tx_jobsystem_domain_model_job']</code> as column 'address'. (l. 328 ):</p>
  
  <pre><code> 'address' =&gt; array(
          'label'  =&gt; $languageFile . ':tx_jobsystem_domain_model_job.address',
          'config' =&gt; array(
              'type'           =&gt; 'inline',
              'foreign_table'  =&gt; 'tt_address',              
              #'foreign_field'  =&gt; 'uid',
              'symmetric_field' =&gt; 'address',    
              'appearance'     =&gt; array(
                  'collapseAll'  =&gt; true,
                  'expandSingle' =&gt; true
              )          
  
          )
      ),
  </code></pre>
  
  <p>I did copy it to <code>$TCA['tx_jobsystem_domain_model_advertisement']</code> at line 116 and used it at l. 272, where the tabs are defined:</p>
  
  <pre><code>'0' =&gt; array('showitem' =&gt; 'hidden,id, ... visits,--div--;Anzeigendetails,title,job,--div--;Firma,address;;;richtext:nowrap;'),
  </code></pre>
  
  <p>This is what i get:</p>
  
  <p><img src="https://i.stack.imgur.com/mff1Z.png" alt="Firma2"></p>
  
  <p>Sourcecode: <code>tca.php</code>
  www.pastebin.com/a9egZsqi</p>
  
  <p>also <code>ext_tables.php</code>:
  www.pastebin.com/rwGbW3qG</p>
  
  <p>Can anyone help me ?</p>