Adding folders to the folder list is pretty complicated. Everybody would expect to do it by drag and drop. (I would like to drop any folder onto the list.) They should be removed with the delete key.
[tagged:"se" tagged:"me" tagged:"pe" bulk edit command]
[not-tagged:"suggestion" tagged:"feature" bulk edit command]
(from ) [#9 state:port] implemented drag&drop for directories on the cocoa side.
(from ) [#9] mapped the delete key to the remove button.
(from ) [#9] Implemented directories drag&drop on the QT side.