fix: load single plot areas on creation

[PierreSchwang]

Overview

Fixes #4467

Description

That change was made quite often in the last couple of years. adWorld returns false if the world is already registered in PS - which it is when creating a single area in an existing world.

Submitter Checklist

Preview Give feedback

1. Make sure you are opening from a topic branch (/feature/fix/docs/ branch (right side)) and not your main branch.
2. Ensure that the pull request title represents the desired changelog entry.
3. New public fields and methods are annotated with @since TODO.
4. I read and followed the contribution guidelines.

[SirYwell]

It seems like it's currently possible to create single plot areas overlapping with others - there is an error, but the area gets created nonetheless.

[PierreSchwang]

It seems like it's currently possible to create single plot areas overlapping with others - there is an error, but the area gets created nonetheless.

Shouldn't be caused by my change, no? The overlapping check is handled in the command itself, before creating the area (and way before loading the area). Can address that though

[SirYwell]

Shouldn't be caused by my change, no? The overlapping check is handled in the command itself, before creating the area (and way before loading the area). Can address that though

Most likely not related, but I think it would be good to fix it here too.