Quality checks page requires help/_ttk_quality_checks.html

[julen]

Since Django 2.1, exceptions from {% include %} tags are not silenced anymore:

Silencing exceptions raised while rendering the {% include %} template tag is deprecated as the behavior is often more confusing than helpful. In Django 2.1, the exception will be raised

This means the help/quality_checks.html page will fail to load if help/_ttk_quality_checks.html is missing. The latter was generated as part of a build process.