Add clear selection action or has changed condition

[rolfschmidt]

Infos:

• Used Zammad version: 5.0
• Installation method (source, package, ..): all
• Operating system: all
• Database + version: all
• Elasticsearch version: all
• Browser + version: all
• Ticket#1091581

Base

The system has 2 select fields

• Category
• Dependent1

Expected behavior:

• It should be possible to clear Depedent1 field if the Category field has changed.

Actual behavior:

• Currently it is only possible to hard select a value but not select a value once or to clear a selection.

Steps to reproduce the behavior:

• Add to fields
• Try to clear the field Dependent1 based on the Category field but only if it has changed not always.

Yes I'm sure this is a bug and no feature request or a general question.