avoid using getPhysicalPath in link_redirect_view display

[yurj]

plone.app.contenttypes/plone/app/contenttypes/browser/link_redirect_view.py

Line 114 in 450888e

meta = "/".join(obj.getPhysicalPath()[2:])

display['meta'] should carry the path from the portal instead of obj.getPhysicalPath()[2:] which contains '/Plone/'. I've found this way to calculate it:

https://5.docs.plone.org/develop/plone/serving/traversing.html#getting-item-path-relative-to-the-site-root

[yurj]

see comment #710 (comment)