Dragging editor pane document icon out of QtCreator and into Windows Explorer moves the file

When you drag the document icon at the top of the editor pane out of QtCreator and into Windows Explorer, the file is moved from its location in your project into the target folder in Explorer.

For an hour, the ability to copy files like this was the coolest QtCreator feature I had "discovered" in a week, ever since discovering that I could drag the icon from one split to another. However, when I couldn't re-open my project because the file I tested was my project file, my sense of wonder turned to horror. 

It is great to be able to copy a file by dragging the document icon – that is a time-saver. But it should not "move" the file in the file system.