Fixed problem where the default depth op parameters were not being read from the same scope as where they were being written.  The side effect of this was that HeeksCNC wasn't retaining the depth op parameters that were being set by the operator for subsequently created depth operation objects.
Fixed problem where the default depth op parameters were
not being read from the same scope as where they were being
written.  The side effect of this was that HeeksCNC wasn't
retaining the depth op parameters that were being set
by the operator for subsequently created depth operation
objects.

silasb/heekscnc,silasb/heekscnc,silasb/heekscnc