Sorting of $incomplete_requirements

I've run into a problem where my post-login profile pageroutes end up redirecting to one one of the pages that's shared across the different memtypes I've set up. I've tracked the bug pretty thoroughly, and it comes down to the way that the $incomplete_requirements variable gets filled. The $user_pages array always gets filled in the proper order with respect to the weights assigned in the pageroute GUI and stored in the pageroute table, but because the foreach loop pulls from $required_types, it's actually possible that $incomplete_requirements can be filled with the right pageroute values, but in the wrong order.

I didn't want to tamper with the use of $required_types in the foreach loop because there may be a reason for using that that I'm not aware of, so I implemented an after-the-fact solution instead. Unfortunately, there's no way for it $incomplete_requirements to know that the values it has are wrong, so the sort() that's in there right now in one of the functions doesn't actually help. I've substituted a sort-by-intersect approach that uses the values from $user_pages, which we know are in the appropriate order, to generate an $incomplete_requirements array that has all the right elements in all the right places.