Ranked Collective pallet (#11548)

* Ranked Collective pallet

* Fixes

* benchmarks

* Weights

* Allow class voting in rank
Use bare ayes for calculating support.
Allow only promotion/demotion by one rank only.
Allow removal of member with rank zero only.
Use new Tally API

* Index by rank, still O(1).

* Custom vote weights

* Formatting

* Update frame/ranked-collective/src/lib.rs

* Broken :(

* origin guard; cleanup uses new API

* Formatting

* Promote/demote by rank

* Formatting

* Use new API

* Remove code in another PR

* Remove code in another PR

* Formatting

* Remove code in another PR

* Docs

* Docs

* Bump

* Fixes

* Formatting

* Fixes

substrate/frame/referenda/src/lib.rs

@@ -150,7 +150,7 @@ pub mod pallet {
 		/// Handler for the unbalanced reduction when slashing a preimage deposit.
 		type Slash: OnUnbalanced<NegativeImbalanceOf<Self, I>>;
 		/// The counting type for votes. Usually just balance.
-		type Votes: AtLeast32BitUnsigned + Copy + Parameter + Member;
+		type Votes: AtLeast32BitUnsigned + Copy + Parameter + Member + MaxEncodedLen;
 		/// The tallying type.
 		type Tally: VoteTally<Self::Votes, TrackIdOf<Self, I>>
 			+ Clone

substrate/frame/referenda/src/types.rs

@@ -136,7 +136,7 @@ pub struct TrackInfo<Balance, Moment> {
 /// Information on the voting tracks.
 pub trait TracksInfo<Balance, Moment> {
 	/// The identifier for a track.
-	type Id: Copy + Parameter + Ord + PartialOrd + Send + Sync + 'static;
+	type Id: Copy + Parameter + Ord + PartialOrd + Send + Sync + 'static + MaxEncodedLen;
 
 	/// The origin type from which a track is implied.
 	type Origin;