send .fullyRead marker when leaving the room

ElementX/Sources/Screens/RoomScreen/RoomScreenViewModel.swift

@@ -122,6 +122,9 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
     }
     
     func stop() {
+        // When navigating away from the room, we need to mark the room as fully read.
+        // This does not affect the read receipts only the notification count.
+        Task { await roomProxy.markAsRead(receiptType: .fullyRead) }
         // Work around QLPreviewController dismissal issues, see the InteractiveQuickLookModifier.
         state.bindings.mediaPreviewViewModel = nil
     }