Reattach the close button to the rotator machine

That was much easier than I expected it to be. I'm still going to alter
how the `machine_ui_base` function works so that I don't have to
remember to attach a button all the time.

src/widgets/machines.rs

@@ -2,7 +2,7 @@ use bevy::{color::palettes::css::*, prelude::*, ui::Val::*};
 
 use crate::{
   game::machines::*,
-  widgets::{machine_ui_base, spawn_big_red_button},
+  widgets::{CloseButton, machine_ui_base, spawn_big_red_button},
 };
 
 impl CuttingMachine {
@@ -52,6 +52,7 @@ impl RotatingMachine {
     commands
       .spawn((machine_ui_base("Rotating Machine"),))
       .with_children(|commands| {
+        commands.spawn(CloseButton::bundle(commands.target_entity()));
         commands.spawn((
           Node {
             padding: UiRect::all(Px(10.0)),

src/widgets/mod.rs

@@ -38,23 +38,21 @@ fn machine_ui_base(header: impl Into<String>) -> impl Bundle {
     },
     BackgroundColor(SLATE_100.into()),
     BorderRadius::all(Percent(2.0)),
-    children![
-      (
-        // TODO: A real node with stuff in it (buttons, maybe?)
-        Node {
-          justify_content: JustifyContent::Center,
-          grid_column: GridPlacement::span(2),
-          ..default()
-        },
-        BackgroundColor(RED.into()),
-        Pickable::default(),
-        children![(
-          Text::new(header),
-          TextColor(BLACK.into()),
-          // TODO: Text shadow, maybe. I couldn't make it look good.
-        )],
-      ),
-    ],
+    children![(
+      // TODO: A real node with stuff in it (buttons, maybe?)
+      Node {
+        justify_content: JustifyContent::Center,
+        grid_column: GridPlacement::span(2),
+        ..default()
+      },
+      BackgroundColor(RED.into()),
+      Pickable::default(),
+      children![(
+        Text::new(header),
+        TextColor(BLACK.into()),
+        // TODO: Text shadow, maybe. I couldn't make it look good.
+      )],
+    ),],
   )
 }