- $pollChoices provides for just about every imaginable piece of info
  about polling options for Poll Started, Poll Progress, and Poll Ended
  events.
- Meanwhile, $pollTitle is a bit more focused for just the title of a
  poll.
- Fix mismatched metadata for the poll-progress and poll-end events.
- Implements the remaining bits of crowbartools#2732

- and add manual triggering to $pollChoices

- "title" is a valid propertySelector.
- Ignore an empty string (or anything falsy) as a propertySelector.
- Better commentary

- Include choice IDs in raw object returns (raw or null property
  selector).
- Simulate more realistic IDs in polling event metadata.

Add simulate event controls to $pollChoices. Thanks CK!