status editable

[``* `#17013` User is shown as deleted incorrectly``](http://community.openproject.org/work_packages/17013)

Please mark is as work in progress
@NobodysNightmare what happens if step 2 is not discarded as loadWorkPackageForm enhances the workPackage with a .form attribute, but returns the same wp in order to work as before, while still chaining the workpackage and form requests.