EditView: merges releaseEditList and killEditList

This separation is not needed now, and after stateful-views I'm not
convinced it is worth keeping until we really need that.

Also, this fixes the error: "You cannot apply bindings multiple times to
the same element."
Merge pull request #192 from inaes-tic/mediaedit-multiple-bindings

EditView: fixes the error: "You cannot apply bindings multiple times to the same element."