ipdevinfo "affected" tab needs to properly list the affected organizations

[Morten Brekkevold]

As requested by nav-ref:

* the affected organizations heading must always be visible, even if the organization list is empty
* the "send e-mail" button should be greyed out when there are no e-mail addresses to send to

[John-Magne Bredal (john-m-bredal)]

Fix here. https://nav.uninett.no/hg/stable/rev/e07f5f2dbecc