Signature Widget becoming not required

[Apotischman]

Describe the bug If a user signs the required signature widget, clears it, tries to complete and cancels, the widget no longer required

To Reproduce

1. Draw a line in the signature widget
2. Clear the signature widget (note the item appears as required as expected)
3. Click Complete button and click "Confirm"
4. An alert appears stating that some values have errors. Click "Cancel"
5. The widget is no longer required

Expected behavior A required field should stay required

XFORM_sig_widget.txt

[MartijnR]

• [x] enketo-express-oc: http://localhost:8005/preview/i/4ede979b896383a891ab1d3d601710c4 (can reproduce)
• [x] enketo/enketo-express: http://localhost:8005/preview/MEwQsaMI (can reproduce)
• [x] enketo-core: http://localhost:8005/?xform=http://localhost:3000/form/sig_widget/form.xml (can reproduce)

[MartijnR]

issue: https://github.com/enketo/enketo/issues/54 fix: https://github.com/enketo/enketo-core/pull/931

[MartijnR]

• [x] merge enketo/enketo-express (5.0.1 or higher)