532: Now mode TableName is auto generated if not specified (shouldn't matter just in case).
632: Fix -DataTable "" to use LoadFromDataTable with style (auto generated name)
820: DataTable + TableStyle without TableName corruption fix. Also simplified even more.
822: Change back to "-TableName $TableName" as cange broke test:
Export-Excel.Tests.ps1
617: Undo change test was correct.