Set visible ranges on the home screen sliding sync view (#342)

* Set visible ranges on the home screen sliding sync view
* Prevent the visible items from being updated while in search mode
* Enable diffs on invalidations as they seem to fix duplicated events in the home screen room list
* Promoted some diffing logs to info from verbose

ElementX/Sources/Services/Client/MockClientProxy.swift

@@ -18,7 +18,7 @@ import Combine
 import Foundation
 import MatrixRustSDK
 
-struct MockClientProxy: ClientProxyProtocol {
+class MockClientProxy: ClientProxyProtocol {
     let callbacks = PassthroughSubject<ClientProxyCallback, Never>()
     
     let userIdentifier: String
@@ -29,10 +29,17 @@ struct MockClientProxy: ClientProxyProtocol {
     
     var roomSummaryProvider: RoomSummaryProviderProtocol? = MockRoomSummaryProvider()
     
+    internal init(userIdentifier: String, roomSummaryProvider: RoomSummaryProviderProtocol? = MockRoomSummaryProvider()) {
+        self.userIdentifier = userIdentifier
+        self.roomSummaryProvider = roomSummaryProvider
+    }
+    
     func startSync() { }
     
     func stopSync() { }
     
+    func restartSync() { }
+    
     func roomForIdentifier(_ identifier: String) async -> RoomProxyProtocol? {
         nil
     }