dms: use lazyvstack

It gets too poppy otherwise

Changelog-Fixed: Made DMs less poppy

damus/Views/DMChatView.swift

@@ -19,7 +19,7 @@ struct DMChatView: View {
     var Messages: some View {
         ScrollViewReader { scroller in
             ScrollView {
-                VStack(alignment: .leading) {
+                LazyVStack(alignment: .leading) {
                     ForEach(Array(zip(dms.events, dms.events.indices)), id: \.0.id) { (ev, ind) in
                         DMView(event: dms.events[ind], damus_state: damus_state)
                             .contextMenu{MenuItems(event: ev, keypair: damus_state.keypair, target_pubkey: ev.pubkey, bookmarks: damus_state.bookmarks, muted_threads: damus_state.muted_threads)}