(core) Simple localization support and currency selector.

Summary:
- Grist document has a associated "locale" setting that affects how currency is formatted.
- Currency selector for number format.

Test Plan: not done

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: paulfitz

Differential Revision: https://phab.getgrist.com/D2977

app/client/models/SearchModel.ts

@@ -217,7 +217,7 @@ class FinderImpl implements IFinder {
 
     this._fieldStepper.array = section.viewFields().peek();
     this._fieldFormatters = this._fieldStepper.array.map(
-      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson()));
+      f => createFormatter(f.displayColModel().type(), f.widgetOptionsJson(), f.documentSettings()));
     return tableModel;
   }