Duplicate of D388.

Added missing option/phrase for configuration editor screen.

Can't test - have PHP 7.2.19 only

I have no php 7.4 on VM to test/review this.

1. moved handling of "relative" format from "kDateFormatter::Parse" method (where it wasn't working obviously) to the "kDateFormatter::Format" method
2. restored "DateHelper" class, that was removed in 622 diff by mistake

Tested - got 0 and 1 codes, as planned.

Please test again. Also update test plan to include testing of added code fragment: http://qa.in-portal.org/D379?vs=927&id=929#toc .

Don't perform unique validation from TEMP to LIVE table, when parent record isn't yet created in TEMP table.

Detected an issue (SQL error), when validation of sub-item happens to before parent item is saved into the database.

In D377#7476, @erik wrote:

Tested, accepted.

In the run_event. php first line must be commented to make test plan possible.

exit_code(1, 'This script needs to be enabled manually !');

In the run_event. php first line must be commented to make test plan possible.

Got JS alert "Copying operation in Temporary tables has failed. Please contact website administrator." If this is popup about concurrent Save attempt - then accepted.