Don't use GWT numeric formatting to override the glom currency formatting.

Don't use GWT numeric formatting to override the glom currency formatting.

Currencies are now displayed like they are in Glom. See this bug:

https://bugzilla.gnome.org/show_bug.cgi?id=646216

* src/main/java/org/glom/web/client/Utils.java: Remove GWT currency
formatting.
* src/main/java/org/glom/web/client/ui/cell/NumericCell.java: Add
currency code to constructor and set it when the cell is rendered.
* src/main/java/org/glom/web/client/ui/list/ListTable.java: Add the
currency code to the constructor of the NumericCell.