This content (and title) can be edited by the proposal author to explain the rationale behind the proposal.

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

 The dispatch of this call must be `ExternalMajorityOrigin`.

 - `proposal_hash`: The preimage hash of the proposal.

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

 # <weight>
 - `O(1)`.
 - One DB change.
 # </weight>

 Kill all storage items with a key that starts with the given prefix.

- There is a proposal being made on Polkassembly.
- The proposal is called CouncilMotion.
- The author of the proposal can explain why they made it.
- The content of the proposal can be edited.
- The proposal is about making a decision.

#120 On chain council motion