"Save" button in the Dialog of the Test Steps causes a javascript error when before clicking it, a delete step operation has been made in de Dialog

Short Description: "Save" button in the Dialog of the Test Steps causes a javascript error when before clicking it, a delete step operation has been made in de Dialog.

Steps to Reproduce:

1 - Navigate to a manual Test with steps.

2 - Click in the bigger dialog (Edit in Dialog).

3 - Delete a test step.

4 - Press "Save" button in the Dialog.

Actual Results: A javascript error cannot read 'filter' of undefined is displayed.

Expected Results: No error should be displayed.