Fix Codename charts sometimes being detected as Legacy Psych charts

[swordcube]

title says it all

[swordcube]

afaik, FormatDetector detects certain properties like stage, dad, etc that codename charts so happen to have, and these have higher priority over the literal flag that marks a codename chart for some reason

[MaybeMaru]

This is a VERY dumb fix, but ill take it for now as long as it works lol
The way the format detector works for formats with the same extension is by detecting specific parts of the file and guess the format based on how close its to matching values. The "_" at the start of _"codenameChart" shouldve been enough to count it as a high priority match, but i guess it wasnt enough. Will have to really give the format detector a second look sometime to fix all these issues