More localization (#358)

* Translate missing items on About page

* Localize import summary dialog

* Make site menu translation reactive

* Localize import options

* Include semi colon in string

* Move API texts to frontend + better status codes

* Provide feedback to user when no meal is planned

* Fix API tests after latest rework

* Add warning for API changes in changelog

* Refactor API texts handling

* Refactor API texts handling #2

* Better API feedback

* Rearrange strings hierarchy

* Add messages upon recipe updated

* Fix 'recipe effected' typo

* Remove snackbar usage in backend

* Translate toolbox

* Provide feedback for tags CRUD

* Fix messed up merge

* Translate sign-up form

* Better feedback for sign-up CRUD

* Refactor log-in API texts handling

* No error message when user is not authenticated

* Remove unimportant console log

frontend/src/components/MealPlan/MealPlanEditor.vue

@@ -36,8 +36,9 @@ export default {
       return utils.getDateAsPythonDate(dateObject);
     },
     async update() {
-      await api.mealPlans.update(this.mealPlan.uid, this.mealPlan);
-      this.$emit("updated");
+      if (await api.mealPlans.update(this.mealPlan.uid, this.mealPlan)) {
+        this.$emit("updated");
+      }
     },
   },
 };