MP player name with special character appear blank on the player head.

[WillyB1337]

[ohlidalp]

Problem identified: RoR correctly keeps the nickname in utf8 'Français' but tries to render it as narrow-text, so the utf8 'ç' (0xC3 0xA7) (source) becomes 2 narrow text characters 'Ã' and '§' (source) but they end up as empty space because the're left out from the used fontdef (see "highcontrast_black" in file "resources/OgreCore/higcontrast.fontdef").

A complication is that "highcontrast_black" is a bitmap font, all characters are pre-rendered in texture "highcontrast_black.png". We have to either generate new texture and fontdef, or use actual font rendering to create the labels.