title: copy typoscript inside files added with addTypoScriptSetup seem not to work
body: <p>In my own extension in TYPO3 7.6, I added typoscript via ext_localconf.php:</p>
  
  <pre><code>\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScriptSetup(
      '&lt;INCLUDE_TYPOSCRIPT: source="FILE:EXT:myextension/Configuration/TypoScript/setup.ts"&gt;'
  );
  </code></pre>
  
  <p>The added typoscript is very simple.
  But surprisingly this doesn't work:</p>
  
  <pre><code>content &lt; styles.content.get
  </code></pre>
  
  <p>whereas this works:</p>
  
  <pre><code>content = CONTENT
  content {
    table = tt_content
    select.orderBy = sorting
    select.where = colPos = 0
  }
  </code></pre>
  
  <p>It seems to me that copying typoscript-Object generally doesn't work inside files that are included via <code>ExtensionManagementUtility::addTypoScriptSetup</code>. </p>
  
  <p>Is that so? And, if yes: Why is that?</p>