How to reproduce

• Go to back-office
• add a content digest service in a page, select news (only)

Actual behavior

• In the filters we have "last publication date", "start date" and "end date"
• "last publication date" can be filtered on "futur" and "past date" :
• "start date" and "end date" contains only "empty" and "not empty" 

Expected behavior

• "start date" and "end date" can be filtered on "futur" and "past date"