Error out if user tries to use global or pedgree array as axis.

You can't use the global or pegree ids as an axis array inside
of prism. Instead of crashing, we now just error out.

Change-Id: I6d1d4f71250746dbe107e1fb6be6fba8e455fe64
Showing curves doesn't break view scaling controls.

When you now enable the curves the full and threshold bounds are
properly displayed now, instead of being set to -1 to 1

Change-Id: If2e6abf95b5e4176ac8fbaeb05c89144b044a7a4
Merge topic '13263_prism_view_scaling' into next

7d7d1a9 Showing curves doesn't break view scaling controls.
500118e Error out if user tries to use global or pedgree array as axis.