[Fix] - Change respawn point listing logic

[Bubbus]

Resolves #277

⚠️ If the respawn point is linked to something (like a vehicle), the player probably won't respawn on that thing with this new implementation. Needs to be resolved before taking this out of draft. ⚠️

Pull Request Description

When merged this pull request will:

• Fix issue described in [Bug] Names of respawn positions get shuffled if one is deleted #277
• Not tested yet - probably needs another MP test or a live test on a Saturday mish.
• Changes the logic a little for which spawnpoints are considered eligible. Probably worth a glance.

Release Notes

Changed the way that the available respawn points are calculated for each player. This should help cases where you select one place to spawn and you appear in a different place.

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