Make ModelController's default return limit configurable

[nbeatty-gpa]

Get Take value from DefaultRecordsPerPage setting in systemSettings from the configuration file.

Still a draft because models which do not explicitly set the Take value using the Return Limit attribute sometimes behave differently when Take is not null.

For example, in System Center, the ByUser and ByUserGroup pages override ModelController functionality for non-database fields, so they are searched with the model controller, then filtered or sorted according to these fields, before being paginated afterwards. When the Take value is set, the base ModelController SQL query includes "TOP {Take}", which breaks the later filtering, sorting, and pagination.

There also seem to be issues with some models such as Asset when the default is set to a single-digit value, since in trying to link an Asset to an AssetType, it fetches all AssetTypes, but if they have a ReturnLimit it's not guaranteed that an existing record will be pulled and found as a match.

Overall, it seems to me that using the Take value as both a limit for non-paged queries and a page size is problematic, and we would need to make these two values distinct.