Don't always skip the empty form action

empty form action shouldn't always be skipped

```
<form id="credentials" method="post" action="">
        <div id="cred_userid_container" class="login_textfield textfield">
            <span class="input_field textfield">
                <label for="cred_userid_inputtext" class="no_display" aria-hidden="true">User account</label>
                <div class="input_border">
```