Security + HTML fixes

Let me start with saying this; The group system may be the best thing since sliced bread! Just started using it, but already much use already for myself and the networking team.

The security fixes (escaping) is mostly for the group system and the alert sytem, since it's much similar code structure.

Included is also minor html fixes. The widget class is used in more places, state-marker added to device/edt/sensor page. Some icons added here and there.
In short, minor details making for a better layout

Also pagination was added to port groups, since loading several thousnd ports in one group was not very fast..