Actually as the original thread, we are needing to know if your have made any progress in resolving the issue with not being able to Drag&Drop a column from 'Result Sets' (not object explorer) into the Editor panel.
This is particular helpful when building and modifying a query.
To repeat this issue: first execute a query. Once you have the results of the query, in 'Result Sets' window (again, not the object explorer as your screen shot display), try to drag & drop any column name onto the Editor.
As you will see when using Toad for SQL Server 126.96.36.199 (64bit), it fails.