Cherry-pick Equipment Manager fix commit

[CraftedRO]

Changes proposed:

• Partial cherry from The-Cataclysm-Preservation-Project/TrinityCore@3a84661
• This will fix the targeted issue where you are unable to save more than one equipment set at once
• Credit goes to original authors.

Issues addressed:

Closes #26030

Tests performed:

Does it build, tested in-game as can be seen below:

https://youtu.be/2vzjZghyyUM

Known issues and TODO list: (add/remove lines as needed)

• [ None as I know ]

[Shauren]

Use git commit --author to preserve that information