Better titles for error pages

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/html/403.html

 {% extends "base.html" %}
 {% load i18n %}
 
+{% block breadcrumbs %}
+<li><a href="{% url 'home' %}">{% trans "Permission Denied" %}</a></li>
+{% endblock %}
+
 {% block content %}
 
 <p>

weblate/html/404.html

 {% extends "base.html" %}
 {% load i18n %}
 
+{% block breadcrumbs %}
+<li><a href="{% url 'home' %}">{% trans "Page Not Found" %}</a></li>
+{% endblock %}
+
 {% block content %}
 
 <p>

weblate/html/500.html

 {% extends "base.html" %}
 {% load i18n %}
 
+{% block breadcrumbs %}
+<li><a href="{% url 'home' %}">{% trans "Internal Server Error" %}</a></li>
+{% endblock %}
+
 {% block content %}
 <h2>{% trans "Server Error" %}</h2>
 

weblate/trans/views/basic.py

@@ -377,7 +377,11 @@ def server_error(request):
         return render(
             request,
             '500.html',
-            status=500
+            {
+                'request_path': request.path,
+                'title': _('Internal Server Error'),
+            },
+            status=500,
         )
     except Exception:
         return django.views.defaults.server_error(request)