[window] increase default width of windows and resize areas

egui/src/containers/resize.rs

@@ -37,7 +37,7 @@ impl Default for Resize {
             id: None,
             resizable: true,
             min_size: Vec2::splat(16.0),
-            default_size: vec2(128.0, 128.0), // TODO: perferred size for a resizable area (e.g. a window or a text edit)
+            default_size: vec2(320.0, 128.0), // TODO: preferred size of `Resize` area.
             outline: true,
         }
     }

egui/src/containers/window.rs

@@ -40,7 +40,7 @@ impl<'open> Window<'open> {
             resize: Resize::default()
                 .outline(false)
                 .min_size([96.0, 32.0])
-                .default_size([280.0, 400.0]),
+                .default_size([420.0, 420.0]),
             scroll: None,
             collapsible: true,
         }

egui/src/demos/app.rs

@@ -139,11 +139,9 @@ impl DemoApp {
 
 impl app::App for DemoApp {
     fn ui(&mut self, ui: &mut Ui, backend: &mut dyn app::Backend) {
-        Window::new("Backend")
-            .default_width(500.0)
-            .show(ui.ctx(), |ui| {
-                self.backend_ui(ui, backend);
-            });
+        Window::new("Backend").scroll(false).show(ui.ctx(), |ui| {
+            self.backend_ui(ui, backend);
+        });
 
         let web_info = backend.web_info();
         let web_location_hash = web_info