$entity loaded from form_state is potentially stale in editable_fields_form_submit()

I am using the patch in #1694940: Edit individual fields for a node in a block. to expose editable field forms via formblocks.

The issue I am running into is that if I expose multiple editable fields, specifically textareas, I run into some strange behavior if I edit two textareas without refreshing the page.

To reproduce create a node with two textareas and expose this with formblock & editablefields.

1. Edit one textarea and click outside the textarea
2. The text is properly updated
3. Edit the second textarea and click outside the textarea
4. The text in the first textarea is reverted prior to edits in step 1, the changes to text area 2 are save
5. Regardless of steps the changes for textarea 1, will constantly be reverted.

This procedure can be reversed to edit textarea 2 first and the behavior is the same, with the exception that none of the edits for textarea 2 will be saved.

This appears to be a result of the $entity as saved to form_state['editablefields_entities'][$element['#entity_type']][$element['#entity_id']] and used in editablefields_form_submit().

The attached patch resolves the issue for us and results in both textarea's edits being saved properly.