Release 2.18.1458

Released on Apr 17, 2018 and includes the following:

• AI-1793 FIXED: Deleted reference values must be shown as #Value!
• AI-1875 FIXED: Data entry form fails to validate correctly when data is pasted into field
• AI-1888 FIXED: Update ActivityInfo.org https certificate
• AI-1556 Query API should include multiple selection fields value as a comma-delimited strings
• AI-1659 Migrate GetSites implementation to new query engine