Room preview on a long press should not update the read receipt (#6027)

- Done

Riot/Modules/Room/DataSources/RoomPreviewDataSource.swift

@@ -0,0 +1,46 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+/// `RoomPreviewDataSource` is used for room context menu.
+@objcMembers
+public class RoomPreviewDataSource: RoomDataSource {
+    
+    public override func finalizeInitialization() {
+        super.finalizeInitialization()
+        showReadMarker = false
+        showBubbleReceipts = false
+        showTypingRow = false
+    }
+    
+    public override var showReadMarker: Bool {
+        get {
+            return false
+        } set {
+            _ = newValue
+        }
+    }
+    
+    public override var showBubbleReceipts: Bool {
+        get {
+            return false
+        } set {
+            _ = newValue
+        }
+    }
+    
+}