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().
asmuelle/heekscnc,jihyun-kim/heekscnc,asmuelle/heekscnc,jihyun-kim/heekscnc,jihyun-kim/heekscnc,satovey/heekscnc,satovey/heekscnc,jihyun-kim/heekscnc,satovey/heekscnc,asmuelle/heekscnc,asmuelle/heekscnc,satovey/heekscnc