Removed <dl> structure from NoticeListItem::showDeleteLink. Reason:

Removed <dl> structure from NoticeListItem::showDeleteLink. Reason:
To speed up DOM load by cutting down 3 nodes in each notice list item.
Generally each notice option should be a list item in a <ul>, however,
there is no tangible benefit for the user using this approach. In this
case, minimalism is favoured. Similarly, the new approach will make 5
fewer function calls on the server side.