If you accidentally access ( right-click or File->DeleteFolder ) the 'Delete' function on a Mail Account sub-folder (non-Inbox), you are presented with a pop-up stating: "Deleting this folder is not undoable and will delete all of the messages it contains, and its sub-folders. Are you sure you still want to delete the folder 'dab-TRAVEL'?"
With two clickable entries: "Cancel" and/or "Delete Folder"
The "Delete Folder" optipon is highlighted and is the DEFAULT OPTION if you reflexively hit Enter.
To avoid the folder deletion (destruction) you must actively seek out the non-default option. ( 'X' it or hit Cancel )
IMHO: To have the default option be destruction of the folder is a bad design.
The default option should be 'Cancel'.
