Cannot edit newly created objects

New objects created through the web interface (this is the case, at least, for algorithms, libraries and dataformats), cannot be modified anymore. This is inconsistent w.r.t. the behavior of the "Delete" button, that shows up unlocked (as it should) for newly created objects, meaning we can delete them.

If we can delete an object, we should have the ability to modify it completely (for example, edit its code or declaration).