Common - Make FUNC(isModLoaded) case-insensitive

[johnb432]

When merged this pull request will:

• Title.
• We could make it so that ace_common_fnc_isModLoaded is not case sensitive, but that means adding a toLowerANSI.

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[PabstMirror]

I think we should make the func non-case sensitive and easy to use (it's Public: Yes)
I'm really shocked all these things were broken and not noticed

are non-ansi even allowed in config names?

[LinkIsGrim]

I'm not sure why it wasn't made case-insensitive when the cache was introduced (performance concerns on using a toLower)? The function works regardless, a cache miss due to casing just means the config lookup is done again. But yeah it should be changed IMO

AFAIK non-ANSI isn't allowed in config, no.

[LinkIsGrim]

Mod name (I assume this was to be used with modParams) never actually worked, updated header to match.