fix(app): restore on_context_drawer functionality that was removed in 59a913c

src/app/cosmic.rs

@@ -369,6 +369,7 @@ impl<T: Application> Cosmic<T> {
 
             Message::ContextDrawer(show) => {
                 self.app.core_mut().window.show_context = show;
+                return self.app.on_context_drawer();
             }
 
             Message::Drag => return command::drag(Some(self.app.main_window_id())),

src/app/mod.rs

@@ -490,6 +490,11 @@ where
         None
     }
 
+    // Called when context drawer is toggled
+    fn on_context_drawer(&mut self) -> iced::Command<Message<Self::Message>> {
+        iced::Command::none()
+    }
+
     /// Called when the escape key is pressed.
     fn on_escape(&mut self) -> iced::Command<Message<Self::Message>> {
         iced::Command::none()