Introduce Program::run_with to control the initial state

examples/tour/src/main.rs

@@ -21,19 +21,13 @@ pub fn main() -> iced::Result {
         .run()
 }
 
+#[derive(Default)]
 pub struct Tour {
     steps: Steps,
     debug: bool,
 }
 
 impl Tour {
-    fn new() -> Self {
-        Self {
-            steps: Steps::new(),
-            debug: false,
-        }
-    }
-
     fn title(&self) -> String {
         format!("{} - Iced", self.steps.title())
     }
@@ -90,12 +84,6 @@ impl Tour {
     }
 }
 
-impl Default for Tour {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
 #[derive(Debug, Clone)]
 pub enum Message {
     BackPressed,
@@ -177,6 +165,12 @@ impl Steps {
     }
 }
 
+impl Default for Steps {
+    fn default() -> Self {
+        Steps::new()
+    }
+}
+
 enum Step {
     Welcome,
     Slider {