Sorting images into folders: Up arrow should work

[Pauwehla]

In the images-windows there are the folders and an icons for the up-folder.
Drag-and-drop into the subfolders does its job - but the way up
with using the up-icons does not work.

To move images into their parent folder you have to use the folders-tab.
But doing so is uncomfortable and slow and
you have to read and find the correct folder.