Refactor `assignee` in Checkoutable to accept null#18273

snipe merged 1 commit intogrokability:developgrokability/snipe-it:developfrom

Godmartinz:fix-null-assignee-bug-in-checkoutableGodmartinz/snipe-it:fix-null-assignee-bug-in-checkoutableCopy head branch name to clipboard