Fixed an error on ImageForm.

The help text for the albums field was wrong.
Updated the titles of Gallery pages.

Updated ConfirmDelete pages to include a button for confirming the
delete action.

A delete button was added to AlbumDetail and ImageDetail pages.

The content title for the AlbumConfirmDelete, AlbumDetail, AlbumForm,
AlbumReorder, AlbumUpload, ImageConfirmDelete, ImageDetail, and
ImageForm pages have been updated to include a link back to their
respective Detail pages.