#18 possible duplicates while importing an image.

[Aju Mathew]

When you import a picture using drag and drop from the
preview window to the album window, Swingpix very
swifly removies the selected image from the preview
window ( Very good feature), this prevents the user from
dragging the same picture into the album.
But if the user changes the directory and comes back
to the directory he/she selected his/her picture from, the
user can see all the images again and can drag the
selected images again to the album creating duplicate
pictures( same picture with different names).