Issue #2865344 by mpdonadio, Lendude, mbovan, organicwire, alexpott, jibran,...

Issue #2865344 by mpdonadio, Lendude, mbovan, organicwire, alexpott, jibran, jhedstrom, bobemoe, Berdir, larowlan: Exposed date filters 'empty' and 'not empty' are broken

(cherry picked from commit 8e3bcf48)