fix(profile): adds the prepare hook for the profile page’s owner menu

In 4c94f8809f1131e2d8e073518195b6b65b26aceb the prepare hook was added to
elgg_view_menu, but in the manual rendering on the profile page this hook
was forgotten. This adds it so plugins can reorder/alter the profile
page menus.

Fixes #6085
Merge pull request #7585 from mrclay/6085

fix(profile): adds the prepare hook for the profile page’s owner menu