Active learning fails to jump on suggestions without feature values

[reckart]

Describe the bug The active learning sidebar assumes that a suggestion has a label/feature value. And it waits for the feature value to be set in order to jump to the next suggestions. However, for layers where we do not have feature values (all annotations have the empty value), this fails.

To Reproduce

1. Create a simple "span / relation" project
2. annotate a word that occurs multiple times in a document - do not set the feature value
3. enable active learning
4. accept a suggestion
5. see how it does not jump

Expected behavior Possibly we need to exclude suggestions without labels from active learning - or find another solution such that jumping works.

Please complete the following information:

• Version and build ID: 23.8