#24 Roman (non-italic) Cyrillic letters

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Make all cyrillic letters to be printed as regular (roman, non-italic) in the %%gg part of iFormula automatically. E.g.:

%%ii @1@ EQDEF g_k > g_kкр
g_k > g_{k"кр"} %%gg

Traditionally most of variables in formulas of documents and publications are written in Latin and Greek. But we may also use Cyrillic letters in formulas in Russia. In general they are used as index of a variable, but not only. Since there are several identical glyphs in Latin and Cyrillic alphabet, we follow the simple rule: cyrillic letter should be always non-italic. This lets us clearly distinguish them.

My request is to implement it as an option in a document and global settings.