Fix debug-toolbar with jinja

sith/toolbar_debug.py

@@ -0,0 +1,8 @@
+from debug_toolbar.panels.templates import TemplatesPanel as BaseTemplatesPanel
+
+class TemplatesPanel(BaseTemplatesPanel):
+    def generate_stats(self, *args):
+        template = self.templates[0]['template']
+        if not hasattr(template, 'engine') and hasattr(template, 'backend'):
+            template.engine = template.backend
+        return super().generate_stats(*args)