Add confirmation view for removing products from wish lists

We can't always POST to the view, so an optional confirmation view was
added.

Fixes #1121
String fixes for wish lists

One string wasn't marked for translation. And 'Edit' was unclear,
because 'view'ing a wish list would allow one to edit it's products. So
'Edit' has been renamed to 'wish list settings', where one currently can
only change the name.