values and fetched in SB are lower cased

In places where we directly access $sb->{'values'} or
fetched use lc() as these hashes are with lowercased
keys.

Problem shows in situations when $sb->Column(...) returns value
based on FIELD argument which can have mixed case. For example
ALL(TimeWorked) statistics demontstrates the problem.
use hide_overlapping_values in any case

Our calculations can be wrong, if GD new enough then we
can correct mistakes. Hidden labels are better than out
of bounds.