Auto-collapse of folders in Thunderbird

earlywirgit

New Email
I used to be able to click-and-drag an email, hover over the appropriate folder until it expanded to the place where I desired to store the email. I could then let go the mouse button. The email would be filed where I wanted, and the folder hierarchy would automatically collapse. Some time ago this auto-collapse feature flew the coop, and I can't figure how to get it back. It may have been after I upgraded to Yosemite. I would appreciate any help that you can offer.
 
Top