Extend "Recently Done Items" list#860

Would be awesome to extend the recently done items list to over 2 weeks, or make it configuarable. Helps in doing reprints after QA issues are discovered a few days after printing is complete (or when waiting for all prints to complete that are printing over several days before final QA and reprint decision takes place).

Setting is live :) https://simplyprint.io/panel/settings/queue#general