{% macro nav_button(is_active, key, url, text) %}
{{text}}
{% endmacro %}
{% macro course_menu(active) %}
{% if g.is_teacher %}
{% endif %}
{% endmacro %}
{% macro topic_menu(active, student_uid=-1) %}
{% if g.is_teacher or g.is_grader %}
{% set is_normal_topic = g.topic.ident != None %}
{% endif %}
{% endmacro %}