add: desktop entry, metadata, app name, icons

src/main.rs

@@ -16,6 +16,7 @@ use gtk4::{
 };
 
 const APP_ID: &str = "com.wyattjmiller.snespatcher";
+const APP_NAME: &str = "SNES Patcher";
 
 #[derive(Clone)]
 struct SelectionState {
@@ -31,6 +32,7 @@ struct SelectionRow {
 }
 
 fn main() {
+    glib::set_application_name(APP_NAME);
     let app = Application::new(Some(APP_ID), Default::default());
     app.connect_activate(build_ui);
     app.run();
@@ -194,6 +196,8 @@ fn build_header_bar(
     about.connect_activate(glib::clone!(@weak window => move |_, _| {
         let dialog = AboutDialog::builder()
             .transient_for(&window)
+            .program_name(APP_NAME)
+            .logo_icon_name(APP_ID)
             .modal(true)
             .program_name("SNES Patcher")
             .version(env!("CARGO_PKG_VERSION"))