Resume data entry (without form state)

[praseodym]

This PR is a minimal implementation of resuming data entry, without saving/recovering state like accepted warnings. This means that the data will be filled in, the form will start at the 'Recounted' page and the left side navigation will not show progress. Navigating to the next page will also show previous data on that page.

Saving and recovering the full form state is part of a future issue in #137.

Also note that the Mock Service Worker build does not currently support resuming a data entry, implementing this is also part of a future issue in #137.

Resolves #355.

[cikzh]

Mostly reviewed the backend code which LGTM!

[jorisleker]

@praseodym should I see the incomplete data entries in an alert on the pick polling station page? (I don't, but not sure if it was intended that way)

[praseodym]

@praseodym should I see the incomplete data entries in an alert on the pick polling station page? (I don't, but not sure if it was intended that way)

No, that's for #369.

[jorisleker]

State of the 'accept warnings' checkboxes do not seem to be remembered. Guess they should, bit weird to re-accept warnings to be able to see next steps

[praseodym]

State of the 'accept warnings' checkboxes do not seem to be remembered. Guess they should, bit weird to re-accept warnings to be able to see next steps

This PR implements the minimal version that does not restore the form state (like accepted warnings), see the PR description and the epic (#137). Saving and restoring the form state is part of a later issue.

[jorisleker]

State of the 'accept warnings' checkboxes do not seem to be remembered. Guess they should, bit weird to re-accept warnings to be able to see next steps

This PR implements the minimal version that does not restore the form state (like accepted warnings), see the PR description and the epic (#137). Saving and restoring the form state is part of a later issue.

Ah okay. Wasn't aware that checked checkboxes are part of the state of the form and not of the data. But if this will be fixed in a later issue, 👌