Replaces the mailbox's click-to-open-next mechanic with a fully-functional mailbox menu that shows new mail and old mail with titles and customizable envelope icons.
Increase gift favorability first time giving an item and on birthdays, decrease favorability for giving the same gift too often, optionally show all loved and liked gifts in NPC profiles.
Adds two fully-functional doors as craftable, buyable furniture. Lets modders create similar doors, as well as lockable door furniture with keys and key rings.
