Sort muted rooms to the bottom of their section of the room list (#10592)

* muted-to-the-bottom POC

* split muted rooms in natural algorithm

* add previous event to account data dispatch

* add muted to notification state

* sort muted rooms to the bottom

* only split muted rooms when sorting is RECENT

* remove debugs

* use RoomNotifState better

* add default notifications test util

* test getChangedOverrideRoomPushRules

* remove file

* test roomudpate in roomliststore

* unit test ImportanceAlgorithm

* strict fixes

* test recent x importance with muted rooms

* unit test NaturalAlgorithm

* test naturalalgorithm with muted rooms

* strict fixes

* comments

* add push rules test utility

* strict fixes

* more strict

* tidy comment

* document previousevent on account data dispatch event

* simplify (?) room mute rule utilities, comments

* remove debug

src/stores/room-list/models.ts

@@ -43,6 +43,7 @@ export type TagID = string | DefaultTagID;
 export enum RoomUpdateCause {
     Timeline = "TIMELINE",
     PossibleTagChange = "POSSIBLE_TAG_CHANGE",
+    PossibleMuteChange = "POSSIBLE_MUTE_CHANGE",
     ReadReceipt = "READ_RECEIPT",
     NewRoom = "NEW_ROOM",
     RoomRemoved = "ROOM_REMOVED",