Bug 31397: Set focus in first input when adding a new bibliographic framework

Bug 31397: Set focus in first input when adding a new bibliographic framework

When adding a new bibliographic framework, the focus/cursor should be
in the first input field of the form: Framework code

To test:
* Add a new bibliographic framework from adminsitration > bibliographic
  MARC frameworks
  - cursur is in no field
* Apply patch
* Add another new framework
  - cursor is now in the first input field of the form: Framework code

https://bugs.koha-community.org/show_bug.cgi?id=27191

Signed-off-by: Barbara Johnson <barbara.johnson@bedfordtx.gov>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>