title: TinyMCE: Nested lists if tab key is pressed
body: <p>if you create an unordered list in tinymce and hit the tab key the code created looks like this:</p>
  
  <pre><code>&lt;ul&gt;
  &lt;li&gt;&lt;span style="white-space: pre;"&gt; &lt;/span&gt;list item 1&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>however, if you click on the indent button in the editor's toolbar (instead of the tab key), the following code is created:</p>
  
  <pre><code>&lt;ul&gt;
  &lt;li&gt;list item 1
  &lt;ul&gt;
  &lt;li&gt;list item 1.1&lt;/li&gt;
  &lt;/ul&gt;
  &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>i would like that same thing to happen when i press the tab key. i want nested lists instead of just a white space. is there a way to achieve this? thanks!</p>