Be able to select which user model to upgrade - not always the lowest access model.
When choosing to upgrade via LibCentral, and if you already have more than one user model (e.g. a 1U and a 3U), we need to be able to select which model to upgrade. i.e. Be able to chose if you upgrade the 3U or the 1U depending on your needs. Currently you can only upgrade the lowest access model. if an unlimited becomes available, you must first upgrade the 1U instead of being able to upgrade your 3U (and therefore pay a smaller upgrade price).