Navigates to the previous visited folder.
getImageUploader("ImageUploaderID").GoToPreviousFolder();true or false) which
specifies whether it succeeded (true) or not (false). For
example, it will return false if the user did not navigate any folder yet (i.e.
the control is just loaded).
Image Uploader does not store a history of visited folders. Thus you can navigate only to one previous folder. If you call this method twice, you will be moved back to the current folder.