feat: custom sort order for morph features (#1794)

lib/pangea/analytics_details_popup/morph_analytics_view.dart

@@ -31,6 +31,12 @@ class MorphAnalyticsView extends StatelessWidget {
           builder: (context, snapshot) {
             final morphs = snapshot.data ?? defaultMorphMapping;
 
+            morphs.displayFeatures.sort(
+              (a, b) => morphFeatureSortOrder
+                  .indexOf(a.feature)
+                  .compareTo(morphFeatureSortOrder.indexOf(b.feature)),
+            );
+
             return snapshot.connectionState == ConnectionState.done
                 ? ListView.builder(
                     key: const PageStorageKey<String>('morph-analytics'),

lib/pangea/morphs/default_morph_mapping.dart

@@ -232,3 +232,36 @@ final MorphFeaturesAndTags defaultMorphMapping = MorphFeaturesAndTags.fromJson({
     }
   ],
 });
+
+final List<String> morphFeatureSortOrder = [
+  "pos",
+  "advtype",
+  "aspect",
+  "case",
+  "conjtype",
+  "definite",
+  "degree",
+  "evident",
+  "gender",
+  "mood",
+  "nountype",
+  "numform",
+  "numtype",
+  "number",
+  "number[psor]",
+  "person",
+  "polarity",
+  "polite",
+  "poss",
+  "prepcase",
+  "prontype",
+  "punctside",
+  "puncttype",
+  "reflex",
+  "tense",
+  "verbform",
+  "verbtype",
+  "voice",
+  "foreign",
+  "x",
+];