[demo] Alwyas start with widget gallery

egui_demo_lib/src/apps/demo/mod.rs

@@ -34,7 +34,8 @@ pub trait View {
 
 /// Something to view
 pub trait Demo {
-    fn name(&self) -> &str;
+    /// `&'static` so we can also use it as a key to store open/close state.
+    fn name(&self) -> &'static str;
 
     /// Show windows, etc
     fn show(&mut self, ctx: &egui::CtxRef, open: &mut bool);