Currently there is a limit of 1000 users in the global
user list. This change introduces paging so that an
admin can see all users and not just the first 1000.
Adds a new route to the api - /api/users/search that
returns a list of users and a total count. It takes
two parameters perpage and page that enable paging.
Fixes#7469
The data source list is case sensitive when sorted. This changes the
sort to be case insensitive. The test only tests the handler, not the
routing or database query.
