When I have a folder open and documents showing in the right-hand pane, I want to drag a file to another folder in the Folders pane. When I do that, the target folder automatically opens and shows the sub-folders as soon as I hover over it. This can cause problems if I drop the file to soon, because it then might end up in the wrong folder. 

Is there any way to prevent the target folder from opening as soon as I hover over it?