CSS enhancement

htdocs/admin/events.php

htdocs/admin/perms.php

htdocs/admin/proxy.php

htdocs/admin/security.php

htdocs/admin/security_file.php

htdocs/admin/security_other.php

htdocs/admin/translation.php

htdocs/core/class/html.form.class.php

htdocs/core/lib/functions.lib.php

htdocs/holiday/card.php

htdocs/theme/eldy/style.css.php

htdocs/theme/md/style.css.php

htdocs/user/class/user.class.php

htdocs/user/hierarchy.php

htdocs/user/home.php

htdocs/user/index.php