style: Use layout name as css class

src/data/loading.rs

@@ -253,14 +253,14 @@ fn load_layout_data_with_fallback(
 }
 
 pub fn load_layout(
-    name: String,
+    name: &String,
     kind: ArrangementKind,
     variant: ContentPurpose,
-    overlay: Option<String>,
+    overlay: &Option<String>,
 ) -> layout::Layout {
     let overlay = overlay.as_ref().map(String::as_str);
     let (found_kind, layout)
-        = load_layout_data_with_fallback(&name, kind, variant, overlay);
+        = load_layout_data_with_fallback(name, kind, variant, overlay);
     layout::Layout::new(layout, found_kind, variant)
 }