Enhancements to monitor/upgrade recurring contributions search/form

• Adds "payment processor" and "contact (entityref)" to the "Upgrade Recurring Contributions" search.
• Fixes links in monitor recur so that: View recurring does not go to frontend on WordPress. View Activity includes contact ID (as it complains when you click done otherwise). Both are popup instead of new tab.

mentioned in merge request !2 (closed)

mentioned in commit f8097536

merged

Looks good, thanks @mattwire