I agree with the naming convention of "never" and "always", however, it already had "no" in there, so i went with the previous convention.
I have made the modifications to the code. and added the setter in conf.c
However i feel that to avoid some confusion, the label "Disable lcd off" should be changed to something more meaningful like "Prevent Auto Shutdown" or "Disable Auto Shutdown".
attached is an updated diff file tested with the latest build 985.