Settings lock on a creative world is removed when using mctemplate

Partner Rank: 3

Summary:
Settings lock on a creative world is removed after creating the world using a mctemplate

Locked the World Settings with setting the isWorldTemplateOptionLocked to 1 in level.dat

Impact:
We are unable to lock the world that requires the user to not change settings.

The reason to lock City Living (and any other Creative Toolbox maps) is that some users set the world difficulty to peaceful, this causes hostile mobs to disappear.

Because we remodel the hostile mobs to be interior, half of the pre-spawned mob get removed when the user put the world to peaceful.

Repro Steps:

1. Download City Living by Noxcrew [Needs to be version 1.2.0 or 1.2.1]
2. Create the world using a mctemplate (or if 1.2.1 is present in the store us the store)
3. Observe the world settings are not locked when creating the world

Observed Results:

World settings are not locked for a creative world created from a mctemplate

Expected Results:

World settings stay locked when a creative world is locked even after creating a mctemplate from it.

Screenshots/Videos attached: No