[Wallet] Edit NFT form adds a new token instead of updating the existing token

[josheleonard]

Description

Currently, when editing an NFT a new NFT is added and the existing one is still visible.

Steps to reproduce

1. Load a wallet the owns an ERC721 NFT
2. edit the NFT via the Edit NFT form

Actual result

The edited NFT is not removed and a new NFT with the edits is added.

brave_YqSx2SxTE9.mp4

Expected result

The edited NFT is removed and a new NFT with the edits is added.

Reproduces how often

Easily reproduced

Brave version (brave://version info)

1.70.3 Chromium: 127.0.6533.57 (Official Build) nightly (arm64)

Channel information

• release (stable)
• beta
• nightly

Reproducibility

• with Brave Shields disabled
• with Brave Rewards disabled
• in the latest version of Chrome

Miscellaneous information

No response

[kjozwiak]

The above requires 1.69.123 or higher for 1.69.x verification 👍

[srirambv]

Verification passed on

Brave	1.69.124 Chromium: 127.0.6533.73 (Official Build) beta (64-bit)
Revision	dbc9035349f74e493f3293d93f4cbf35c597dfec
OS	Windows 11 Version 23H2 (Build 22631.3880)

• Verified steps from issue description
• Verified editing an NFT updates the NFT to new value
• Verified editing an NFT to a different contract address updates the NFT to new value

39921.mp4