[Evolution] Annoying double-click behavior

[David Burleigh <david burleigh gmx com>]

I don't know whether this is a bug or a feature, but it is annoying that when browsing for a file to attach, Evolution seems to respond to the double-click action by both opening the selected folder and attaching the first file within that folder, when the obvious intention is just to open the folder and then wait for the user to select a file within that folder.