update browser constructor api, prelude required entities only

src/app/browser.rs

@@ -3,12 +3,37 @@
 
 use gtk::{Application, ApplicationWindow};
 
-pub fn new(app: &Application) -> ApplicationWindow
+pub fn new(
+    app : &Application,
+    width : i32,
+    height : i32
+) -> ApplicationWindow
 {
-    return ApplicationWindow::builder().application(app)
-                                       .default_width(640)
-                                       .default_height(480)
-                                       .titlebar(&header::new())
-                                       .child(&main::new())
-                                       .build();
+    return ApplicationWindow::builder()
+
+        // Relate
+        .application(
+            app
+        )
+
+        // Tuneup
+        .default_width(
+            width
+        )
+
+        .default_height(
+            height
+        )
+
+        // Init components
+        .titlebar(
+            &header::new()
+        )
+
+        .child(
+            &main::new()
+        )
+
+        // Make
+        .build();
 }

src/main.rs

@@ -1,7 +1,15 @@
 #[path = "app/browser.rs"] mod browser;
 
-use gtk::prelude::*;
-use gtk::{glib, Application};
+use gtk::prelude::{
+    ApplicationExt,
+    ApplicationExtManual,
+    GtkWindowExt
+};
+
+use gtk::{
+    Application,
+    glib
+};
 
 fn main() -> glib::ExitCode
 {
@@ -13,7 +21,9 @@ fn main() -> glib::ExitCode
         |app|
         {
             browser::new(
-                app
+                app,
+                640,
+                480
             ).present();
         }
     );