Arranging multi-color objects with disabled
multi_materials_on_same_plate option was not currect.
Previously we only consider the first extruder id for multi-color
objects. Now we consider all extruders.
Jira: STUDIO-2164
Change-Id: If64ff4f88f0fe4f6c31ebf657b3449b19bf063f0
(cherry picked from commit f4f6bdd00a0c3d3e13406b69be9b5b0468b27d44)