Summary:
Ref T11096. Currently, editing ProfileMenuItemConfigurations always requires that you can edit the corresponding object.
This is correct for global items (for example: you can't change the global menu for a project unless you can edit the project) but not for personal items.
For personal items, only require that the user can edit the `customPHID` object. Today, this is always their own profile.
Test Plan: As a non-admin, edited personal menu items.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11096
Differential Revision: https://secure.phabricator.com/D17228
b0dfd42eef