Tidy up misc. widgets XHTML

"captive_portal_status.widget.php"
Remove NAME from TABLE tag, not valid in XHTML

"carp_status.widget.php"
Add missing closing TD tag

"dyn_dns_status.widget.php" and "installed_packages.widgete.php"
Update TD class to single line

"load_balancer_status.widget.php"
Add quotes to missing TD background colour

"traffic_graphs.widget.php"
Tidy up HTML Boolean operator
Make NAME and ID in INPUT tag unique

"wake_on_lan.widget.php"
Remove B tag from "widgetsubheader", alread in CSS
Center message across all columns within table