BUG: Fix rescale over time in color map editor

Rename some function calls which were performed on the
non-over-time version.

The functionnality was broken in PV - since July 2013 I guess.

Change-Id: I90abb87fc16067aed0ee4a8cd167282595948d07
Merge topic 'rescale_over_time_bug' into next

d9ab9581 BUG: Fix rescale over time in color map editor