implement Default traits

src/app/browser/window/tab/item/page/input/response/control/counter.rs

@@ -8,6 +8,12 @@ pub struct Counter {
     pub widget: Rc<Widget>,
 }
 
+impl Default for Counter {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Counter {
     // Construct
     pub fn new() -> Self {

src/app/browser/window/tab/item/page/input/response/control/counter/widget.rs

@@ -4,6 +4,12 @@ pub struct Widget {
     pub label: Label,
 }
 
+impl Default for Widget {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Widget {
     // Construct
     pub fn new() -> Self {

src/app/browser/window/tab/item/page/input/widget.rs

@@ -7,6 +7,12 @@ pub struct Widget {
     pub clamp: Clamp,
 }
 
+impl Default for Widget {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Widget {
     // Construct
     pub fn new() -> Self {