Make Endpoint list default direction for name sorting ascending

[mikeminutillo]

The default sort order for the endpoint list was descending. This change makes the default sort for the column ascending.

I also created a SortInfo interface and passed that around to bind to instead of having two separate states to pass around.

Fixes #1593

[johnsimons]

@mikeminutillo I noticed you playing with the sorting, so I thought I mentioned it.
Have you considered passing a comparer as a parameter to it, so that you may make the "property name" typed. Because at the moment is a magic string!