Generic list removes empty values when submitted

[Ixbitz]

Required Information

• AEM Version, including Service Packs, Cumulative Fix Packs, etc: On-premise 6.5.21 (servicepack 21)
• ACS AEM Commons Version: 6.9.4
• Reproducible on Latest? yes

Expected Behavior

When adding an empty value to a generic list and save it, I expect that an empty value is saved.

Actual Behavior

When using a generic list as datasource for the iconpicker, the first item should have an empty value to allow the "none" option to work properly in the iconpicker.

Steps to Reproduce

1. Create new generic list: http://localhost:4502/generic-lists.html/etc/acs-commons/lists

2. Add item with title, leave value empty
   

3. Save list

When saved, observe the value is not saved at all:

This causes the iconpicker to display an empty option after the "none" option. The "none" option also does not work anymore.

Links

N/A