bug #4554 Grid-editing timestamp column forces datepicker.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Merge pull request #1374 from ashutoshdhundhara/bug_4554

bug #4554 Grid-editing timestamp column forces datepicker.
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[CI skip]
Merge remote-tracking branch 'origin/QA_4_2' into QA_4_2
ChangeLog entry

Signed-off-by: Marc Delisle <marc@infomarc.info>
Merge commit '536d4ef'
Merge commit '21032ab'
Merge branch 'QA_4_2'