adding restoration to center and side table states.

    - still not working:
     - scroll position of center table is not being restored. could have something to do with the fact that this is a UITableViewController. simpy setting a restorationIdentifier on the tableView had no effect, even though it should
     - drawerWidths are being restored (the checkmark restores to the proper dimension) but then the drawer pops out to it's initial width.