Dunno why this was buggered again. ":back" doesn't seem to function as it used to.
Also, when uploading a file from page "foo", it's important to return to "foo" after
a successful upload, rather than redirecting to the HomePage.
Finally, a favicon tweak.
The file upload dialog asks for a description of the image or file to be uploaded. Use this as the default alt-text for the image and as a title attribute for a file link.
