move thread header modal under statbar, trigger show with edit button.
in thread modal, check that model is valid with set before saving to avoid triggering change event.
prevent form submission from thread modal (submit form by clicking save button).
use 'xxx element' to identify elements in feature steps, to distinguish from models/records.
actually check that when a new link is added in a different locale than this one, that the link is saved to the db.
add minimal thread edit feature, testing only edit in this locale.