remove: multi-window feature

Cargo.toml

@@ -22,7 +22,7 @@ chrono = { version = "0.4.38", features = ["serde"] }
 [dependencies.libcosmic]
 git = "https://github.com/pop-os/libcosmic.git"
 default-features = false
-features = ["multi-window", "tokio", "winit", "wgpu", "about"]
+features = ["tokio", "winit", "wgpu", "about"]
 
 [dependencies.cosmic-ext-config-templates]
 git = "https://github.com/ryanabx/cosmic-ext-config-templates"

src/app.rs

@@ -227,9 +227,7 @@ impl Application for TweakTool {
             )),
         ];
 
-        if let Some(id) = app.core.main_window_id() {
-            tasks.push(app.set_window_title(fl!("app-title"), id));
-        }
+        tasks.push(app.set_window_title(fl!("app-title")));
 
         (app, Task::batch(tasks))
     }
@@ -271,17 +269,13 @@ impl Application for TweakTool {
     ) -> cosmic::iced::Task<app::Message<Self::Message>> {
         self.nav_model.activate(id);
 
-        let Some(win_id) = self.core.main_window_id() else {
-            return Task::none();
-        };
-
         let title = if let Some(page) = self.nav_model.data::<Page>(id) {
             format!("{} - {}", page.title(), fl!("app-title"))
         } else {
             fl!("app-title")
         };
 
-        Task::batch(vec![self.set_window_title(title, win_id)])
+        Task::batch(vec![self.set_window_title(title)])
     }
 
     fn context_drawer(&self) -> Option<ContextDrawer<Self::Message>> {