Make registration page support lightbox so administrator can use it to add users in admin users sheet.

XAADMINISTRATION-21 User not created when registration information isn't correct when creating new user in new Administration UI

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• Closed

XAADMINISTRATION-68 In "Administration > User > Add new user" notify the user when the passwords he types in don't match

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• Closed

XAADMINISTRATION-67 In "Administration > User > Add new user" indicate which fields are mandatory

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• Closed

XWIKI-3337 When creating a user when a name that already exists, no warning is displayed

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• Closed

XWIKI-5694 Unable to close modal window on Users and Groups section

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• Closed