ContentTimelineView inside a page tabView

To get a nice swipe gesture

Closes: #103

Changelog-Changed: Add swipe gesture between posts and post & replies

damus/ContentView.swift

@@ -79,16 +79,13 @@ struct ContentView: View {
 
     var PostingTimelineView: some View {
         VStack {
-            ZStack {
-                if let damus = self.damus_state {
-                    TimelineView(events: $home.events, loading: $home.loading, damus: damus, show_friend_icon: false, filter: filter_event)
-                }
-                if privkey != nil {
-                    PostButtonContainer {
-                        self.active_sheet = .post
-                    }
-                }
+            TabView(selection: $filter_state) {
+                ContentTimelineView
+                    .tag(FilterState.posts)
+                ContentTimelineView
+                    .tag(FilterState.posts_and_replies)
             }
+            .tabViewStyle(.page(indexDisplayMode: .never))
         }
         .safeAreaInset(edge: .top) {
             VStack(spacing: 0) {
@@ -102,6 +99,19 @@ struct ContentView: View {
         }
     }
     
+    var ContentTimelineView: some View {
+        ZStack {
+            if let damus = self.damus_state {
+                TimelineView(events: $home.events, loading: $home.loading, damus: damus, show_friend_icon: false, filter: filter_event)
+            }
+            if privkey != nil {
+                PostButtonContainer {
+                    self.active_sheet = .post
+                }
+            }
+        }
+    }
+    
     var FiltersView: some View {
         VStack{
             Picker("Filter State", selection: $filter_state) {