BUG 14803: Remove redundant "Lock Scalar Range" option

This option is already exposed through the "Automatically rescale
transfer functions to fit data" option.

Change-Id: I949b6dd9e492128a0be17847c6f27dc01bbf61da
Merge topic '14803_remove_redundant_option' into next

d302109f BUG 14803: Remove redundant "Lock Scalar Range" option