Backport to 7.9 - In a Formatted Text field (when multiple), losing focus while pausing for a couple of seconds during typing.

Reproducible Steps

1. Checkout, build and run https://svn.onehippo.org/repos/hippo/hippo-cms7/testsuite/branches/hippo-testsuite-1.06.xx
2. Visit CMS
3. Open Text Document type and add a Formatted Text field. Mark the new Formatted Text field as multiple and ordered.
4. Save and commit
5. Now open/edit a Text Document such as common/About Us page
6. Add a Formatted Text field item by clicking on + button
7. Type some words in the field and wait for about 3-5 seconds
8. You will see the field area seemingly being refreshed
9. The editor lost the focus on the editor. And she or he should find the location being edited and click on it again.