Description of problem:

With the downstream theme enabled, Horizon does not display the logout reason on the login screen.

How reproducible:

Always.

Steps to Reproduce:
1. Login into Horizon.
2. Change your password.
3. The login screen should show text "Password changed. Please log in again to continue."

Actual results:

The text is not visible anywhere on the login screen.

Expected results:

The text should be visible.

Additional info:

This is probably due to wrong nesting of IF blocks in the _login.html template:

    {% if request.user.is_authenticated and 'next' in request.GET %}
    <div class="control-group clearfix error">
      <span class="help-inline"><p>{% trans "You don't have permissions to access:" %}</p>
        <p><b>{{ request.GET.next }}</b></p>
        <p>{% trans "Login as different user or go back to" %}
        <a href="{% url 'horizon:user_home' %}">{% trans "home page" %}</a></p>
      </span>
    </div>
    {% if request.COOKIES.logout_reason %}
    <div class="form-group clearfix error" id="logout_reason">
        <span class="help-block alert alert-danger"><p>{{ request.COOKIES.logout_reason }}</p></span>
    </div>
    {% endif %}

    {% endif %}

Note that one of the ENDIF statements should be moved to right before the second IF.