Modifies any values in the form state to prepare them for saving.
Values in $form_state['values']['editor']['settings'] are saved by Editor module in editor_form_filter_admin_format_submit().
array $form: An associative array containing the structure of the form.
array $form_state: A reference to a keyed array containing the current state of the form.
function settingsFormSubmit(array $form, array &$form_state);