Update routes.php

Because the previous commit broke an installation I've changed the commit. If you're using bootstrap 3.0 you've configured the view.pagination pagination::slider-3. This will break the navigation for bootstrap 3.0 users. To fix this the view needs to be set to pagination::slider. This was done in the previous commit however it set the fix for all installations. Now it only changes the view.pagination if you've configure pagination::slider-3.

NOTE 1: It assumes that you're using the default slider-3 file.
NOTE 2: It sets the original configuration back when the paginator is created.