Store operation date on case items

[Nicklas Nordborg]

The operation date is stored as an annotation on specimen tubes. This creates a problem for cases were no specimen has been received. The personal registration wizard should be updated to also store a copy of the operation date on the case item. Existing cases need to be updated manually with the help of a batch import.

[Nicklas Nordborg]

(In [1592]) Fixes #374: Store operation date on case items

[Nicklas Nordborg]

We can't simply copy the date from the specimen to the case, since a single case may represent multiple operation dates. We need a different annotation type on the case that allow multiple values to be stored.

[Nicklas Nordborg]

(In [1597]) Fixes #374: Store operation date on case items

Added SamplingDateTimeCase annotation type that can hold multiple values.

[Nicklas Nordborg]

There is no need to store the time part on the case level. We should change the annotation type to only hold date values and update the registration wizard.

[Nicklas Nordborg]

(In [1600]) Fixes #374: Store operation date on case items

Renamed SamplingDateTimeCase to SamplingDateCase and changed it's type to only store date values. Existing annotation values are not modified and should be moved to the new annotation type with a batch importer. The old annotation type can then be deleted.

[Nicklas Nordborg]

(In [1609]) References #374: Store operation date on case items

Fixes an issue with the sampling date field being disabled with a message 'Multiple dates have already been registered ...' when no date at all has been registered. This could happen if a consent was registered before the main referral form and no specimen has been received.