network: bootstrap confirm buttons

network/templates/network/confirm/remove_host_group.html

@@ -10,7 +10,7 @@
     <p>Are you sure you want to remove hostgroup <strong>"{{ group }}"</strong> 
     from <strong>"{{ host }}"</strong>?</p>
     <input type="hidden" value="{{ request.GET.from }}" name="next" />
-    <input type="submit" value="Confirm" />
+    <a href="{{ request.GET.from }}" class="btn btn-info">Back</a>         
+    <input type="submit" class="btn btn-danger" value="Confirm" />
 </form>
-
 {% endblock %}

network/templates/network/confirm/rule_delete.html

@@ -9,7 +9,8 @@
 <form action="" method="post">{% csrf_token %}
     <p>Are you sure you want to delete <strong>"{{ object }}"</strong>?</p>
     <input type="hidden" value="{{ request.GET.from }}" name="next" />
-    <input type="submit" value="Confirm" />
+    <a href="{{ request.GET.from }}" class="btn btn-info">Back</a>
+    <input type="submit" class="btn btn-danger" value="Confirm" />
 </form>
 
 {% endblock %}