Library: Simplify "Status Page" entry (#793)

Author: UrtsiSantsi

src/Library/demos/Status Page/main.blp

@@ -5,21 +5,20 @@ Adw.StatusPage status_page {
   title: _("Status Page");
   description: _("A page used for empty/error states and similar use-cases.");
   icon-name: "loupe-symbolic";
-  child: child;
-}
 
-Box child {
-  margin-top: 18;
-  orientation: vertical;
-  halign: center;
+  Box {
+    margin-top: 18;
+    orientation: vertical;
+    halign: center;
 
-  LinkButton {
-    label: _("API Reference");
-    uri: "https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.4/class.StatusPage.html";
-  }
+    LinkButton {
+      label: _("API Reference");
+      uri: "https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1.4/class.StatusPage.html";
+    }
 
-  LinkButton {
-    label: _("Human Interface Guidelines");
-    uri: "https://developer.gnome.org/hig/patterns/feedback/placeholders.html";
+    LinkButton {
+      label: _("Human Interface Guidelines");
+      uri: "https://developer.gnome.org/hig/patterns/feedback/placeholders.html";
+    }
   }
 }