core: cleanup templates, add template for backend authentication

passbook/core/auth/backend_factor.py

@@ -16,6 +16,7 @@ class AuthenticationBackendFactor(FormView, AuthenticationFactor):
     """Authentication factor which authenticates against django's AuthBackend"""
 
     form_class = AuthenticationBackendFactorForm
+    template_name = 'login/factors/backend.html'
 
     def form_valid(self, form):
         """Authenticate against django's authentication backend"""

passbook/core/templates/login/factors/backend.html

@@ -0,0 +1,8 @@
+{% extends 'login/form.html' %}
+
+{% load i18n %}
+
+{% block above_form %}
+<span class="pficon pficon-unlocked"></span>
+{% trans "This is a text" %}
+{% endblock %}

passbook/core/templates/login/form.html

@@ -10,6 +10,8 @@
 {% include 'partials/messages.html' %}
 <form method="POST">
   {% csrf_token %}
+  {% block above_form %}
+  {% endblock %}
   {% include 'partials/form_login.html' %}
   <button type="submit" class="btn btn-primary btn-block btn-lg">{% trans primary_action %}</button>
 </form>