Route list lazy loading slash pagination

[ajgreenman]

The route lists are going to get hairy fast, so let's add some pagination or lazy loading to them so that we can load routes more efficiently

[ajgreenman]

I think the main "active" route list can be queried all at once, as there will only ever be ~100 active routes at a time. It's important that we only query for "active" though and not all, as eventually that list will get huge (because of removed routes).

For removed routes specifically, again we only should query for removed, but we will want to start paginating them. We also should reorder that view by removal date, and give options for filtering by date range