Review accented characters in the PUA and map them as ligatures

[rimas-kudelis]

Jonova makes use of the Unicode's Private Use Area. Some of the glyphs that are placed there (letters with accents, namely U+E000-U+E023, U+EC00-U+EC15, U+EE00-U+EE1D, U+EF00-U+EF03) should likely at least be mapped as ligatures to the appropriate sequences of base characters and combining characters.