Schoolbord: image 0.0.20 gepind in app-versie 0.0.21

Herstelt de start van 0.0.19 (Missing translation key nav.group.rental): de
teksten van de nieuwe knoppen stonden op de plek van die van het menu. Geen
migratie. Digest gecontroleerd bij het register; store-tests groen (110 en
de release-bump-test).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

whatsnext-schoolbord/umbrel-app.yml

@@ -13,7 +13,7 @@ storage:
   dataRoot: data
 category: finance
 name: Schoolbord
-version: "0.0.20"
+version: "0.0.21"
 tagline: Tenants, agreements and monthly invoices for a small venue
 description: >-
   Schoolbord keeps the people of a small venue, the agreements made with them, and what follows
@@ -26,7 +26,9 @@ description: >-
   It has its own login and was made for Schooltje Boschoord; it speaks Dutch. Everything stays in your
   app folder on your Umbrel and goes along with your Umbrel backup.
 releaseNotes: >-
-  Going back and forth between related rows: on a selected row, the buttons "Naar ..." stand apart
+  Fixes the start of 0.0.19, which stopped at "Missing translation key: 'nav.group.rental'": the
+  texts of the new buttons had taken the place of those of the menu. With that version it brings
+  going back and forth between related rows: on a selected row, the buttons "Naar ..." stand apart
   after a bar and open what belongs to it on another page. From a person to her agreements, agenda,
   notes and invoices, each as a list narrowed to her; from an agreement to its person, its moments
   and its notes; from the agenda to the agreement, the person and the notes; from an invoice to its