1.
If the folders are far from one another and you want to move just one cell, the easiest way is probably to go to the web page in one folder and then right click on web page - add to fast dial and add to other folder.
And then delete previous entry

2.
To move a cell to a folder on the same page of Fast Dial use CTRL + drag and drop

3.
To move a cell the other way, that is out of a folder backwards into the page where the folder is, drag the cell to the backwards cell (top left). The cell will disappear from the folder and appear on the Fast Dial page on which the cell is situated.