Allow adding multiple selectors for Organizations, Roles, Sites, Teams and User Groups in the same form

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: None
• Fix Version/s: 6.2.0 CE M4
• Component/s: User Management, WCM, WCM > Sites Management
• Labels: None
• Epic/Theme:
  • LPRE
  • Social_WCM
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/8934

Include a callback parameter in the selector windows to determine the javascript function which will handle the selection.