Merge commit from fork

* Validate room upgrade relationships properly

Ensures only correctly related rooms are left when leaving the latest version of a room.
Ensures the room list does not wrongly hide rooms which have not yet been upgraded.
Ensures the breadcrumbs store finds the correct latest version of a room for a given stored room.

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Tests

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

test/unit-tests/stores/room-list/RoomListStore-test.ts

@@ -115,6 +115,10 @@ describe("RoomListStore", () => {
         // Given a store we can spy on
         const { store, handleRoomUpdate } = createStore();
 
+        mocked(client.getRoomUpgradeHistory).mockImplementation((roomId) =>
+            roomId === roomWithCreatePredecessor.roomId ? [oldRoom, roomWithCreatePredecessor] : [],
+        );
+
         // When we tell it we joined a new room that has an old room as
         // predecessor in the create event
         const payload = {