CSS user-select is non-standard, and not essential, so removing

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5480 2fea6a4d-a838-0410-917b-93a53c48e9d2
Cap D on Default section title

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5481 2fea6a4d-a838-0410-917b-93a53c48e9d2
Remove css3-mediaqueries.js and create a specific IE8 stylesheet

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5482 2fea6a4d-a838-0410-917b-93a53c48e9d2
Merge remote-tracking branch 'upstream/master'