CTEs

[MarkMpn]

Implemented Common Table Expressions - fixes #292

• Non-recursive CTEs expanded to subqueries for compatibility with TDS Endpoint
• Recursive CTEs converted to hierarchical FetchXML filters where possible

Fixed use of UNION with wildcard columns
Fixed error in nested loop joins with no records from inner source
Check for multi-currency issues when aggregating non-base currency fields
Allow using columns from outer queries in join criteria - fixes #376
Support disconnecting instances from ADS Object Explorer
Added missing files to MarkMpn.Sql4Cds.Engine.FetchXml NuGet package - fixes #377
Handle time zone mismatch for starting bulk delete jobs - fixes #380
Reduce use of custom sorts on merge joins - prefer hash joins when sort cannot be folded to source
Switch FetchXML sort to custom sorting after adding joins that require custom paging
Avoid folding filters to tables in subqueries if the same alias exists in the outer query
Show plugin log more reliably in message output
Do not fold NOT IN queries using an inner join to a left outer join - fixes #382