AKModel: Fix wiki export

Currently, the wiki export uses a hardcoded prefix Ak Spalte 475. This should be changed to either an event field or a form during export.

changed milestone to %KIF 48,0

added bug label

mentioned in commit 2f7a9b0d

mentioned in merge request !58 (merged)

assigned to @bhaettasch

mentioned in commit fcb2ef1f

closed with commit fcb2ef1f

mentioned in commit 5aa09956

closed with merge request !58 (merged)