Added an option under General/General to "Disable Drag and Drop in Editor" (grammar?).  The logic is negative (disable) because it's supposed to be a rare thing.

It works by disabling the "drop" operation in both docked editor and standalone Query Analyzer Window.  It does, however, show the signs of dragging a piece of text by changing the cursor shape because the actual DND on that component is still enabled - for instance, one can drag a piece of text into another application.

Let me know if that is not what people want.