arranger: spawning clips once again!1

crates/app/src/api.rs

@@ -18,6 +18,20 @@ handle!(TuiIn: |self: App, input|Ok(if let Some(command) = self.config.keys.comm
 }));
 
 #[tengri_proc::command(App)] impl AppCommand {
+    fn edit (app: &mut App) -> Perhaps<Self> {
+        let selection = app.selection().clone();
+        Ok(match selection {
+            Selection::TrackClip { track, scene } => {
+                let clip = &mut app.scenes_mut()[scene].clips[track];
+                if clip.is_none() {
+                    *clip = Some(Default::default());
+                }
+                app.editor = clip.as_ref().map(|c|c.into());
+                None
+            }
+            _ => None
+        })
+    }
     fn dialog (app: &mut App, dialog: Option<Dialog>) -> Perhaps<Self> {
         app.toggle_dialog(dialog);
         Ok(None)