Namespace missing from IPAddress list view

[bryanculver]

It exists as a column but should be visible by default, which it is not.

[jvanderaa]

Should this be the case only when there is more than one namespace? What about organizations that have a single namespace, it may be an annoyance to see namespace on everything when there is only one.

[glennmatthews]

It can be hidden like any other column by the user if undesired.