bundle multisend on setup

[auryn-macmillan]

Is your feature request related to a problem? Please describe.
When we setup a roles mod, we should prompt the user to choose which multisend contract they want to use.
Currently, we don't set it for users which means that the pilot extension won't work by default.

Describe the solution you'd like
We should default to 0x40A2aCCbd92BCA938b02010E17A5b8929b49130D, but give the user the option to input a different address or choose not to set a multisend address (in which case we don't bundle a setMultisend() call).