chore: add exit_on_close to settings

src/app/mod.rs

@@ -72,6 +72,7 @@ pub fn run<App: Application>(settings: Settings, flags: App::Flags) -> iced::Res
     iced.antialiasing = settings.antialiasing;
     iced.default_font = settings.default_font;
     iced.default_text_size = settings.default_text_size;
+    iced.exit_on_close_request = settings.exit_on_close;
     iced.id = Some(App::APP_ID.to_owned());
 
     #[cfg(feature = "wayland")]

src/app/settings.rs

@@ -59,6 +59,9 @@ pub struct Settings {
 
     /// Whether the window should be transparent.
     pub(crate) transparent: bool,
+
+    /// Whether the application should exit when there are no open windows
+    pub(crate) exit_on_close: bool,
 }
 
 impl Settings {
@@ -93,6 +96,7 @@ impl Default for Settings {
             size_limits: Limits::NONE.min_height(1.0).min_width(1.0),
             theme: crate::theme::system_preference(),
             transparent: false,
+            exit_on_close: true,
         }
     }
 }