Pre-set tabs and auto login

Adding staff client documentation for pre-set tabs and auto login.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Documentation for preset tabs and auto login

Missed the actual documentation in the last commit for preset tabs and
auto login docs. Here it is.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>