NODE: Allow multi-voting but with vote limit in proposals

[thomasgwatson]

Initial proposals implementation allows for:

one user, one vote, and
one user, can vote once for each proposal option
In other voting use-cases, users should be able to:

vote for many options but still have a limit to the number of votes
vote for many options, with a limit for votes but also be able to vote for an option more than once
This ticket is for the implementation of those extra use-cases.