Range form is no longer using form-horizontal

To avoid checkbox issue.

oscar/templates/oscar/dashboard/ranges/range_form.html

 {% endblock header %}
 
 {% block dashboard_content %}
-<form action="." method="post" class="well form-horizontal">
+<form action="." method="post" class="well">
 	{% csrf_token %}
 	{% include "partials/form_fields.html" with form=form %}
 	{% block form_actions %}