This mostly implements #159
Introduce a new field that denotes the timestamp when the plan was published
Introduce admin actions to publish and unpublish the plan and set that timestamp accordingly
Prevent other means to change visibility of the plan
Use that timestamp to only highlight recent changes when they occurred after the plan was already published

Benjamin Hättasch authored 2 years ago and Nadja Geisler committed 2 years ago

Make sure plan is hidden by default and allow to adapt/change this during the usage of the wizard
This fixes #115

The wizard is used instead of the normal built-in creation workflow
It consists of multiple steps to specify the most fundamental settings (especially the timezone), further settings, copying AKCategories and AKRequirements from existing events and activating the event once the basic configuration is done
The steps after the creation (first two steps) can be skipped