User Picker doesn't display a correct value on the User Profile page in view mode

Steps to reproduce:

• extend the "XWiki.XWikiUsers" class by adding a "manager" property of type "List of Users"
• go to the "User Profile" section in XWikiPreferences
• add a section named "job_information" and enter the value "manager" in the "Section Properties" field
• go to your user profile page and notice that in "Inline" mode the User Picker displays a correct value (see the attachment "UserPickerInline.png")
• save the page and notice that the displayed value is "xwiki:XWiki.MarianaGarner" (see the attachment "UserPickerView.png")