Issue #5744: Datestamp default value2 not populated

[indigoxela]

Fixes https://github.com/backdrop/backdrop-issues/issues/5744

[backdrop-ci]

Related to: backdrop/backdrop-issues#5744

[indigoxela]

My favorite random buddy: "Unable to find the wrapper "public""

[dragonbot]

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[quicksketch]

Merged into 1.x and 1.22.x. Thanks @indigoxela!