Translation: config entries should never use translated strings as key
Translation: config entries should never use translated strings as key

This commit fixes 3 missing T (ie. _("string") -> _T("string")) on config.Read().
gaziel/heekscnc,gaziel/heekscnc,gaziel/heekscnc,tbinias/heekscnc,tbinias/heekscnc,tbinias/heekscnc,tbinias/heekscnc,gaziel/heekscnc