When no margin detected, reserve a bit more space for comments

copienator/commands/annotating_with_checks.py

@@ -196,6 +196,7 @@ def _render_student(
                 "id": student_id,
                 "label": label,
                 "header_height": header_height,
+                "layout": final_image.info.get('annotation_layout', annotating.layout_for(None)),
                 "img_h": final_image.height,
             }
         )