Support for translations of menu items

I had also some problems with the previous patch using the UI (Warning: Illegal string offset 'menu_name') and the safe import, so here is an updated patch that Works for me™ ^^

Thank you for the work on this.

A small change to support Translatable menu link uri → module through the link_override field.

This way you can translate the URI and it will be exported to.

Having this feature for the 2.0.x version of the module would be a blessing. I have a large menu that needs translating and this would be a tremendous help.