Adds Mark As Read on Scroll to SwiftUI views.

iOS/AppDefaults.swift

@@ -273,6 +273,7 @@ final class AppDefaults: ObservableObject {
 		}
 		set {
 			AppDefaults.setBool(for: Key.markArticlesAsReadOnScroll, newValue)
+			AppDefaults.shared.objectWillChange.send()
 		}
 	}
 	

iOS/Settings/Appearance/DisplayAndBehaviorsView.swift

@@ -22,6 +22,7 @@ struct DisplayAndBehaviorsView: View {
 			Section(header: Text("Timeline", comment: "Display & Behaviours: Timeline section header")) {
 				SettingsViewRows.sortOldestToNewest($appDefaults.timelineSortDirectionBool)
 				SettingsViewRows.groupByFeed($appDefaults.timelineGroupByFeed)
+				SettingsViewRows.markAsReadOnScroll($appDefaults.markArticlesAsReadOnScroll)
 				SettingsViewRows.refreshToClearReadArticles($appDefaults.refreshClearsReadArticles)
 				SettingsViewRows.timelineLayout
 			}

iOS/Settings/General/SettingsRows.swift

@@ -61,6 +61,16 @@ struct SettingsViewRows {
 		}
 	}
 	
+	
+	/// Toggle for determining if articles are marked as read when scrolling the timeline view.
+	/// - Parameter preference: `Binding<Bool>`
+	/// - Returns: `some View`
+	static func markAsReadOnScroll(_ preference: Binding<Bool>) -> some View {
+		Toggle(isOn: preference) {
+			Text("Mark As Read on Scroll", comment: "Mark As Read on Scroll")
+		}
+	}
+	
 	/// This row, when tapped, will push the the Manage Extension screen
 	/// in to view.
 	static var manageExtensions: some View {