drafts: clear post after posting

Signed-off-by: William Casarin <jb55@jb55.com>

src/draft.rs

@@ -11,6 +11,12 @@ pub struct Drafts {
     pub compose: Draft,
 }
 
+impl Drafts {
+    pub fn clear(&mut self, source: DraftSource) {
+        source.draft(self).buffer = "".to_string();
+    }
+}
+
 pub enum DraftSource<'a> {
     Compose,
     Reply(&'a [u8; 32]), // note id

src/timeline.rs

@@ -296,6 +296,7 @@ pub fn timeline_view(ui: &mut egui::Ui, app: &mut Damus, timeline: usize) {
                                 let raw_msg = format!("[\"EVENT\",{}]", note.json().unwrap());
                                 info!("sending {}", raw_msg);
                                 app.pool.send(&enostr::ClientMessage::raw(raw_msg));
+                                app.drafts.clear(DraftSource::Compose);
                             }
                         }
                     }