Bug: Updating custom character changes the data for incorrect character.

[BillTheBeast]

What doesn't work?

When sending a updated stats for the character to the server incorrect character is in most cases being updated.
More specifically it always updates the very last character from the CustomCharacter table, not the one which id was provided.
This also changes that characters CharacterId, if it is provided.

What is the endpoint and method? (if applicable)

Endpoint: CustomCharacter/

Method: PUT

How can it be reproduced?

1. Send an update call with updated character stats to the server with stats from any character with any characterid already in the list.

What should it do instead?

Update the stats of the character whose id was provided.

[MikhailDeriabin]

Fixed by adding CustomCharacter._id to the update method call.

Fixes are applied to both latest-release and dev builds