De-prioritize Betas and Prototypes on ROM Import

[johnsanc]

Currently the Region Priorities work great, but if there are multiple variations within the same region it seems like most often the Beta or Prototype is selected as the primary by default, perhaps due to the order it was processed. This causes a lot of manual re-work to go in an associate the correct version.

I suggest adding in an additional layer of logic for choosing the priority in the case of the regional duplicate. This could either be hardcoded into the import processing logic or even better you could create a “Variant Priorities” section where the user could prioritize. For example for me here is how my priorities would look:

1. ( Rev # ) - Where the higher the number the higher the priority
2. ( #.## ) - Where the value in parenthesis is treated as a number, the highest number is the highest priority
3. No additional variant info present in filename
4. ( Demo )
5. ( Beta )
6. ( Proto )

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