Enhances Sheezy.art by adding hover information.

Press and hold shift and hover over elements to get further information!

* Comment links will show the comment
* Image links/thumbnails will show the comment
* User-links will show their first thumbnail-containing widget on their profile
* upload button will show the update limit status (e.g. # hours for upload)
* inbox button will show a summary of unread artworks/journals and other notifications