fixes #7701,7702,7703 - adding selector for type of applicability view

for content hosts
Small nitpick - How about forward slash to mimic what subscription manager shows when listing environments?

```
Name:        Stage/RHEL7
Description: 

Name:        Dev/RHEL7
Description: 

Name:        Library/RHEL7
Description: 

Name:        Library/ZooView
Description: 

Name:        Library/NewView
Description: 

Name:        Library
Description: 
```