Restire MobX actions on lists

I previously had to remove the `@action` annotation on some methods due
to an update in the MobX package. The change has since been reverted so
I've decided to add back the annotations.

lib/screens/home/stores/categories_store.dart

@@ -40,6 +40,7 @@ abstract class CategoriesStoreBase with Store {
   }
 
   // Fetches the top categories based on the current cursor.
+  @action
   Future<void> getCategories() async {
     _isLoading = true;
 

lib/screens/home/stores/categories_store.g.dart

@@ -70,6 +70,14 @@ mixin _$CategoriesStore on CategoriesStoreBase, Store {
     });
   }
 
+  late final _$getCategoriesAsyncAction =
+      AsyncAction('CategoriesStoreBase.getCategories', context: context);
+
+  @override
+  Future<void> getCategories() {
+    return _$getCategoriesAsyncAction.run(() => super.getCategories());
+  }
+
   late final _$CategoriesStoreBaseActionController =
       ActionController(name: 'CategoriesStoreBase', context: context);
 

lib/screens/home/stores/list_store.dart

@@ -78,6 +78,7 @@ abstract class ListStoreBase with Store {
   }
 
   /// Fetches the streams based on the type and current cursor.
+  @action
   Future<void> getStreams() async {
     _isLoading = true;
 

lib/screens/home/stores/list_store.g.dart

@@ -93,6 +93,14 @@ mixin _$ListStore on ListStoreBase, Store {
     });
   }
 
+  late final _$getStreamsAsyncAction =
+      AsyncAction('ListStoreBase.getStreams', context: context);
+
+  @override
+  Future<void> getStreams() {
+    return _$getStreamsAsyncAction.run(() => super.getStreams());
+  }
+
   late final _$ListStoreBaseActionController =
       ActionController(name: 'ListStoreBase', context: context);