General improvements
When generating Student Sets, Activity data is no longer read from Preferences Forms, but from the actual generated Activities (either in AM or DM). This means that preferences forms are no longer needed for activity data if you only do activity imports.
It also means that the Study Combination Period (defined in the Study Combination form) will be used for selecting the relevant activities.
A new mapping for enabling Student Set Generation has been added to the Admin pages and needs to be completed for each Study Combination Period