The `set` method of the one2many class returns a list
of the fields that require recomputation,
the computing of the function fields being delayed
for performances reasons.
Nevertheless, if the `set` method was called
through another `set` method, in other words,
nested `set` calls, the fields to recompute returned
by the second, nested, call to set were never recomputed,
the result list were simply lost.
e.g.:
```
create/write
│set
└─── create/write with recs.env.recompute set to False
│set
└─── create
with recs.env.recompute set to False
```
To overcome this problem, the list of old api style
compute fields to recompute is stored
within the environment, and this list is cleared
each time the store_set_value has done its job of
recomputing all old api style compute fields.
opw-629650
opw-632624
closes#6053
b7f1b9c01e