On the all-images event, hide images from hidden events.
[pr0n] / perl /
drwxr-xr-x   ..
drwxr-xr-x - Sesse
-rwxr-xr-x 556 mkpasswd.pl
-rwxr-xr-x 2499 pr0n-upload.pl
-rw-r--r-- 258 pr0n.psgi
-rwxr-xr-x 3480 update-image-cache.pl
-rwxr-xr-x 2714 update-image-info.pl