Description of problem:
After changing a HTML component in a form from a Human Task, the change is missed after clicking on "Apply" button. You will need to click on "Source" -> add your changes/content -> click on "Source" again" and then click on "Apply", so it works.

Version-Release number of selected component (if applicable):
BPM Suite 6.1.0

How reproducible:
Always

Steps to Reproduce:
1. Create a simple task with one HT;
2. Edit HT form;
3. Select and drag the HTML component to the form;
4. Click in the HTML component and in property button;
5. Click on "Source" button and add the code below replacing the HTML:
     <p>
        Pressione o botão abaixo
     </p>
     <button onclick="alert('Hello World');">Test</button>
6. Click on "Apply" button.

Actual results:
Everything will be missed.

Expected results:
The changes should be applied.

Additional info:
A workaround would be click on "Source" button again, after adding the changes and then on "Apply" button.