Enable multi-window feature of libcosmic

Cargo.toml

@@ -27,7 +27,7 @@ rust-embed = "8"
 [dependencies.libcosmic]
 git = "https://github.com/pop-os/libcosmic.git"
 default-features = false
-features = ["tokio", "winit"]
+features = ["multi-window", "tokio", "winit"]
 #path = "../libcosmic"
 
 #TODO: clean up and send changes upstream

src/app.rs

@@ -250,7 +250,7 @@ impl App {
             None => (String::new(), "COSMIC File Manager".to_string()),
         };
         self.set_header_title(header_title);
-        self.set_window_title(window_title)
+        self.set_window_title(window_title, window::Id::MAIN)
     }
 
     fn update_watcher(&mut self) -> Command<Message> {

src/dialog.rs

@@ -123,7 +123,7 @@ impl App {
             None => (String::new(), "COSMIC File Manager".to_string()),
         };
         self.set_header_title(header_title);
-        self.set_window_title(window_title)
+        self.set_window_title(window_title, window::Id::MAIN)
     }
 
     fn update_watcher(&mut self) -> Command<Message> {

src/lib.rs

@@ -15,7 +15,7 @@ use app::{App, Flags};
 mod app;
 use config::{Config, CONFIG_VERSION};
 mod config;
-mod dialog;
+pub mod dialog;
 mod key_bind;
 mod localize;
 mod menu;