Add replay so that iOS filters work

Multiplatform/Shared/Timeline/TimelineModel.swift

@@ -181,6 +181,7 @@ private extension TimelineModel {
 
 		readFilterAndFeedsPublisher = toggledReadFilterPublisher
 			.merge(with: feedsReadFilterPublisher)
+			.share(replay: 1)
 			.eraseToAnyPublisher()
 	}
 	

Multiplatform/Shared/Timeline/TimelineToolbarModifier.swift

@@ -30,6 +30,9 @@ struct TimelineToolbarModifier: ViewModifier {
 							AppAssets.filterInactiveImage.font(.title3)
 						}
 					}
+					.onReceive(timelineModel.readFilterAndFeedsPublisher!) { (_, filtered) in
+						isReadFiltered = filtered
+					}
 					.hidden(isReadFiltered == nil)
 					.help(isReadFiltered ?? false ? "Show Read Articles" : "Filter Read Articles")
 				}
@@ -49,9 +52,6 @@ struct TimelineToolbarModifier: ViewModifier {
 				}
 				#endif
 			}
-			.onReceive(timelineModel.readFilterAndFeedsPublisher!) { (_, filtered) in
-				isReadFiltered = filtered
-			}
 	}
 	
 }