lp1335958 Remove parameters from current checkouts link

The limit and offset parameters can cause patrons to be stuck in a small
section of their current checkout lists. Let's remove those two parameters
when linking to that list from the patron dashboard.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Jim Keenan <jkeenan@cwmars.org>
Signed-off-by: Ben Shum <bshum@biblio.org>