Adheres to https://zeitgeist.subsquare.io/post/2

 Schedule a majority-carries referendum to be tabled next once it is legal to schedule
 an external referendum.

 Unlike `external_propose`, blacklisting has no effect on this and it may replace a
 pre-scheduled `external_propose` call.

- **Problem Statement:** Lack of adherence to the provided link.
- **Significance:** Ensuring compliance with the specified link.
- **Proposed Solution:** Adhering to the content at https://zeitgeist.subsquare.io/post/2.
- **Expected Outcomes:** Improved alignment with the referenced content.

#16 Increase active collator set size to 16