Fixed data range inconsistency between pipeline and lookup table.

Now pipeline takes same approach as lookup table, that is, if there
is more than a single component to data, then the magnitude of the
components is used.  Also made default font size of scalar bar title
and labels more reasonable.

Change-Id: Ibc8961f9331cd5c3c04593c86ec384be1a698758
Merge topic 'pvweb-fix-pipeline-lut-inconsistency' into next

46d191e Fixed data range inconsistency between pipeline and lookup table.