Admin host view filter by infrastructure or not

[fstreun]

In the admin view of all hosts, a filter for infrastructure nodes would be useful.
This already exists for the AS view (#106).

This would be useful after multiple host configurations were updated and the administrator has to update the configuration on various nodes.
With the current view, it is difficult to see which infrastructure hosts have to update their configuration since the list also shows all user nodes.

Potentially, also a filter for nodes that do not have the latest configuration deployed would be useful.