Add optional sorted listing of file contents

src/model/data_form.rs

@@ -26,7 +26,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::model::{
     apply_profile_to_form_entry, Ansichten, Entries, Filter, FormEntry, FormEntryContainer,
-    Listable, MenuCategory, PlausibilityRules, Script,
+    Listable, MenuCategory, PlausibilityRules, Script, Sortable,
 };
 use crate::model::{Haeufigkeiten, Ordner};
 use crate::profile::Profile;
@@ -183,6 +183,12 @@ impl Listable for DataForm {
     }
 }
 
+impl Sortable for DataForm {
+    fn sorting_key(&self) -> String {
+        self.name.clone()
+    }
+}
+
 #[derive(Serialize, Deserialize, Debug)]
 #[serde(deny_unknown_fields)]
 pub struct DataCatalogues {