I have a bunch of items already online in my K2 deployed site. I'm now trying to modify the image size for the categories, by defining what X-Small, Small, Medium, Large, X-Large mean in the Item Image Options of the category edit menu.I find that if I modify these, setting won't take effect unless I reupload the image in each article, and it can get a bit cumbersome if there are many articles. What is the easy way (if there is one) to reprocess all images already uploaded into their new respective sizes?Thanks!