Bug 27802: Set cursor focus in first input when adding a cash register

Bug 27802: Set cursor focus in first input when adding a cash register

Test plan:
1. Visit Administration > Accounting > Cash registers and notice the
cursor is not focussed in the first input field (Name)

2. Apply patch

3. Refresh the new cash registers page and confirm your cursor is
focussed in the first input field (name)

Sponsored-by: Catalyst IT, New Zealand
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>