Change Turing machine default

Description of the bug

From James Harland:

I have just had pointed out to me what appears to be a "feature" of Automatarium. As you may know, you can switch the default behaviour for a Turing machine to be not to halt on a final state via Files -> Preferences. I would prefer the opposite default, but at lease this is easily fixable.

What is not so much is the requirement that there must be at least one final state. See the image below. The lack of any final state should not prevent the machine from executing.

To reproduce

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Expected behavior

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Additional information