CMS-4721 Principal Wizards - Grid collapses after the Principal or UserStore were deleted or created.

Fixed the bug by updating the filter grid refresh calls.
Adding a parameter to the new principal event to determine whether the
newly created node should be placed on the same level as selection or
not.
Merge pull request #1106 from enonic/CMS-4721

CMS-4721 Principal Wizards - Grid collapses after the Principal or UserS...