Remove date button from Scene demo, so as not to fail tests each day (#…

…5657)

crates/egui_demo_lib/src/demo/scene.rs

@@ -11,7 +11,7 @@ pub struct SceneDemo {
 impl Default for SceneDemo {
     fn default() -> Self {
         Self {
-            widget_gallery: Default::default(),
+            widget_gallery: widget_gallery::WidgetGallery::default().with_date_button(false), // disable date button so that we don't fail the snapshot test
             scene_rect: Rect::ZERO, // `egui::Scene` will initialize this to something valid
         }
     }

crates/egui_demo_lib/src/demo/widget_gallery.rs

@@ -22,6 +22,8 @@ pub struct WidgetGallery {
     #[cfg(feature = "chrono")]
     #[cfg_attr(feature = "serde", serde(skip))]
     date: Option<chrono::NaiveDate>,
+
+    with_date_button: bool,
 }
 
 impl Default for WidgetGallery {
@@ -38,10 +40,23 @@ impl Default for WidgetGallery {
             animate_progress_bar: false,
             #[cfg(feature = "chrono")]
             date: None,
+            #[cfg(feature = "chrono")]
+            with_date_button: true,
         }
     }
 }
 
+impl WidgetGallery {
+    #[inline]
+    pub fn with_date_button(mut self, _with_date_button: bool) -> Self {
+        #[cfg(feature = "chrono")]
+        {
+            self.with_date_button = _with_date_button;
+        }
+        self
+    }
+}
+
 impl crate::Demo for WidgetGallery {
     fn name(&self) -> &'static str {
         "🗄 Widget Gallery"
@@ -124,6 +139,8 @@ impl WidgetGallery {
             animate_progress_bar,
             #[cfg(feature = "chrono")]
             date,
+            #[cfg(feature = "chrono")]
+            with_date_button,
         } = self;
 
         ui.add(doc_link_label("Label", "label"));
@@ -226,7 +243,7 @@ impl WidgetGallery {
         ui.end_row();
 
         #[cfg(feature = "chrono")]
-        {
+        if *with_date_button {
             let date = date.get_or_insert_with(|| chrono::offset::Utc::now().date_naive());
             ui.add(doc_link_label_with_crate(
                 "egui_extras",