Bugfix/unlocked outfits locked after migration

[Blizzardsev]

Resolves the following:

• Issue where previously unlocked outfits were locked again after progressing through the migration process, leaving the constituent wearables unlocked but preventing the outfits themselves being listed in the outfit selection menu; affected all unlockable official JN outfits (but not official extra outfits or custom outfits)
• Outfits affected by the above will be unlocked automatically if the player meets the unlock criteria

Introduces the following:

• Updated version to 1.2.4
• Updated documentatation

[Blizzardsev]

Will need updated logos/banners for 1.2.4 before this goes ahead