Theme Boost Union is an enhanced child theme of Boost which is intended, on the one hand, to make Boost simply more configurable and, on the other hand, to provide helpful additional features for the daily Moodle operation of admins, teachers and students.
This is a follow up for another closed PR: https://github.com/moodle-an-hochschulen/moodle-theme_boost_union/pull/109
It solves See Issue https://github.com/moodle-an-hochschulen/moodle-theme_boost_union/issues/98
I changed the logic a bit in comparison to the original Pull-Request: Now a single Mustache template is used for all hint messages for hidden courses.