[STORY] As a programme coordinator, I want to permanently delete a show, for undoing a created show by mistake

Parent: [EPIC] Extend Show Management Area and improve ... (#149 - closed)

The o94 legacy backend provides a "delete show" feature. This permanently deletes a show and all related data.

Similarly as the o94 backend, the delete button should asks for confirmation by outlining the consequences.

---

Side note: In most cases a show is deactivated, rather than deleted, in order to keep history data. Compare the relevant documentation.