We added that functionality to XF 1.5.12:
https://xenforo.com/community/threads/xenforo-1-5-12-released.125318/
(We replaced the aging flash based swfupload with the same uploader we include in XF2. It's not automatically supported by add-ons, though, and there's a global option to turn it off if there are compatibility issues).
https://xenforo.com/community/threads/xenforo-1-5-12-released.125318/
(We replaced the aging flash based swfupload with the same uploader we include in XF2. It's not automatically supported by add-ons, though, and there's a global option to turn it off if there are compatibility issues).