Sortable updates

This adds the ability to drag sort the message icons to our list of drag sortable pages (boards, profile files, smileys, pbe filters/parsers)

Also fixes (improves at least) an issue caused when the page scroll fix was added.  This was a fix that allows you to drag an element and have the page scroll up/down so you can drop items to off screen areas of a list.

That fix had a side effect in that the drag element was visually different form the original element (width of columns was lost).  Still worked fine but looked a bit odd, so this attempts to keep the helper element looking more like the element being dragged.

Cleaned up some of the sortable css, common classes, reduce repeat declarations.

Added in since I was to lazy to create another branch is a fix to the header icons so they work with *nix fonts and work generally better when using page zooms.