Make budgets work again

lib/ui/widgets/add_expense_category.dart

@@ -1,5 +1,8 @@
+import 'package:drift/drift.dart' show Value;
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:get_it/get_it.dart';
+import 'package:okane/database/sqlite.dart';
 import 'package:okane/i18n/strings.g.dart';
 import 'package:okane/ui/state/core.dart';
 
@@ -48,14 +51,16 @@ class AddExpenseCategoryState extends State<AddExpenseCategory> {
                     Spacer(),
                     OutlinedButton(
                       onPressed: () async {
-                        // TODO
-                        /*
-                        final category =
-                            ExpenseCategory()
-                              ..name = _categoryNameController.text;
-                        await upsertExpenseCategory(category);
+                        final category = await GetIt.I
+                            .get<OkaneDatabase>()
+                            .expenseCategoriesDao
+                            .upsertCategory(
+                              ExpenseCategoriesCompanion(
+                                name: Value(_categoryNameController.text),
+                              ),
+                            );
                         _categoryNameController.text = "";
-                        Navigator.of(context).pop(category);*/
+                        Navigator.of(context).pop(category);
                       },
                       child: Text(t.modals.add),
                     ),