Implement PCP administration screen

Personal Campaign Pages administration screen in Administer CiviCRM

This screen allows system administrator to go through the list of all the PCPs set up in the system and change their statuses. It's made of following elements:

• list of Personal Campaign Pages system-wide (sorted by status by default)
  o filter allowing to choose PCPs in only one status
  o filter allowing to choise Contribution Page
  o column: Page Title (linked to personal Campaign page view mode)
  o column: Supporter (displayName, linking to contact record)
  o column: Contribution Page
  o column: Page Active From: ("parent" Contribution Page's validity start date)
  o column: Page Active Until: ("parent" Contribution Page's validity end date)
  o column: Status (displays PCP's status)
  o column: actions - View, Delete, Edit and status change action, based on current page status. If page is in status:
  + "Needs Review" - actions: "Approve", "Reject"
  + "Approved" - actions: "Reject"
  + "Rejected" - actions: "Approve"