Voting wizard multiple choice UX

[grctest]

Feature Request

Describe the Feature Request

The Gridcoin core enforces a limit of 20 poll options in a multiple-choice poll:

Gridcoin-Research/src/gridcoin/voting/fwd.h

Line 31 in c9f3674

constexpr size_t POLL_MAX_CHOICES_SIZE = 20;

The Gridcoin wallet create poll wizard lets you add more than 20 poll options, potentially resulting in invalid polls being rejected by the network.

The feature request is to apply the poll option limit of 20 in the UI.

Describe Preferred Solution

Disabling the + button once 20 options have been added to the list of choices.

Alternatively applying a max length of 20 check within the addChoiceButton function.

Describe Alternatives

Gridcoin wiki update: Document that there's a max of 20 multiple choice questions in a poll.

Related Code

Gridcoin-Research/src/gridcoin/voting/fwd.h

Line 31 in c9f3674

constexpr size_t POLL_MAX_CHOICES_SIZE = 20;

Gridcoin-Research/src/qt/voting/pollwizarddetailspage.cpp

Line 230 in c9f3674

connect(ui->addChoiceButton, &QAbstractButton::clicked, this, [=]() {

https://github.com/gridcoin-community/Gridcoin-Research/blob/c9f3674f0abd92bbbe9c399065051db28a5f85ea/src/qt/forms/voting/pollwizarddetailspage.ui#L290C49-L290C64

Additional Context

The wizard lets you add hundreds of poll options