The Edit links in the actions menu are only available for views written in Splunk's 'simplified XML'. The simplified XML is just a sort of macro or shorthand way of writing a view in the underlying 'advanced XML', and most or quite possibly all of the Cisco app's views are written in the advanced XML.
However you can go to Manager, User Interface, Views, and edit any view you see there.
When you save that edited version, Splunk will create a copy of that view at
i have not played with the Cisco Security App, but i am assuming this app has a directory (similar to the search app) where you can go and modify what you would like.
/splunk/etc/apps/search/default/data/ui/views - here you can modify the views for the search app, try locating a similar directory for the Cisco Security App and try modifying the xml files in there.
Note, i would recommend making a backup to the directory before you commit any changes.