Pick operator: improve the sampler suggestions in the MultiProcessor properties

[ClairAu]

In the Processor properties, when you use the sampler to pick an operator, it returns 2 suggestions:

• using a pointer (often the most preferred way)
• or using a Model.find() syntax

In the MultiProcessor properties, when you use the sampler to pick an operator, it returns only 1 suggestion:

• using a Model.find() syntax

It would be more convenient if the sampler also suggests to get a reference to the operator using a pointer.

[Matthew_Gillespie]

@Clair A This has been done for 23.0.7 and 23.1.1 released today.

[ClairAu]

Thanks Matthew !