Also log missing localization found in frontend (only when MODE == dev)

views/layout/default.blade.php

@@ -36,6 +36,7 @@
 	<script>
 		var Grocy = { };
 		Grocy.Components = { };
+		Grocy.Mode = '{{ GROCY_MODE }}';
 		Grocy.BaseUrl = '{{ $U('/') }}';
 		Grocy.LocalizationStrings = {!! json_encode($localizationStrings) !!};
 		Grocy.ActiveNav = '@yield('activeNav', '')';