Make login template use same logo as home page

tailbone/static/css/login.css

@@ -4,7 +4,7 @@
  ******************************/
 
 #logo {
-    margin: auto;
+    margin: 40px auto;
 }
 
 div.form {

tailbone/templates/login.mako

@@ -14,7 +14,7 @@
 </%def>
 
 <%def name="logo()">
-  ${h.image(request.static_url('tailbone:static/img/home_logo.png'), "Rattail Logo", id='logo')}
+  ${h.image(image_url, "{} logo".format(capture(self.app_title)), id='logo', width=500)}
 </%def>
 
 <%def name="login_form()">

tailbone/views/auth.py

@@ -117,9 +117,14 @@ class AuthenticationView(View):
             else:
                 self.request.session.flash("Invalid username or password", 'error')
 
+        image_url = self.rattail_config.get(
+            'tailbone', 'main_image_url',
+            default=self.request.static_url('tailbone:static/img/home_logo.png'))
+
         return {
             'form': forms.FormRenderer(form),
             'referrer': referrer,
+            'image_url': image_url,
             'dialog': mobile,
         }