Fix for Versioned->allVersions to work with new ORM

[jedateach]

The context for this is that I wanted to show a history of changes for a "Product" page type.
The joined data was either missing, or was incorrect because it came from the wrong records.

I checked out the SQL, and found joins were using Table_versiones.ID field, rather than Table_versions.RecordID AND Table_versions.Version.

Turned out it was using the joins generated by the ORM, rather than replacing with LEFT JOINS. The reason being that the query $tableJoin data is now stored as an array, rather than a string.

This has probably gone unnoticed in the CMS because the data that is retrieved in the page history isn't joined data.

Yes, needs unit tests! Just getting the problem out there for now.

[halkyon]

@jedateach Thanks! Change looks good, thought it needs some unit tests before we can accept it. :)