New feeds not initially selectable from views

Issue Summary

After playing with this module for a while I created a second node view feed, and when creating a new view and adding the argument, only the first node view feed was selectable as an option.

I tried a few different things, and eventually realized that saving the view after adding the node view feed argument to my view and editing it a second time got the second node view feed to show up in the list.

I listed this as a minor bug because it doesn't seem to effect the functionality.