FIX Link generation in templates doesnt work with translatable

Translatable now adds a get parameter `locale` to the end of every link in the CMS.

Prior to this patch, WorkflowField.ss assumed you could build new links by just appending
to the result of $Link, but this is no longer true, since $Link may have GET parameters.
Merge pull request #104 from hafriedlander/fix/adminlinks

FIX Link generation in templates doesnt work with translatable