Added usage of ExPendingCommandStateFactory.Util.sequenceEach in
PushForwardFromCommand to support proper sequential execution of
creation. I.e., when models are indirectly derived, other push forward
from commands are part of the creation, which means that those
particular creations must be finished before the more immediate creation
is executed.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>