Tweaks to padding on navlink-disabled

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5303 2fea6a4d-a838-0410-917b-93a53c48e9d2
Use spans for disables links.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5304 2fea6a4d-a838-0410-917b-93a53c48e9d2
Correct vertical alignment issue on .navlink-disabled

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5305 2fea6a4d-a838-0410-917b-93a53c48e9d2