Overheating - Fix not being able to cool weapons when sitting and inside vehicles

[johnb432]

When merged this pull request will:

• Remove ability to cool weapons when swimming, as it a) doesn't make sense and b) they cool well anyway.
• Add ability to cool weapons when inside vehicles and when sitting. Afaik this existed at some point, but EFUNC(common,progressBar) was missing the necessary exceptions to actually do it.
• Add restart notification to settings that require restarts to take effect.
• Minor code cleanup.

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