Bug 32986: Add patron_slip module to letters and allow printing on members account

Bug 32986: Add patron_slip module to letters and allow printing on members account

This patch adds a new module to letters 'patron_slip' / Patrons toolbar
(slip)

This also combines some of the slip printing JS to make things more
direct

To test:
1 - Apply patch
2 - restart_all
3 - yarn build
4 - Confirm you can print slip, summary, quickslip, and checkin slip
  when viewing a patron's account
5 - Enable  DisplayClearScreenButton syspref, and test that it works
  with both values
6 - Go to Tools->Notices and slips
7 - Define a new notice in the 'Patron toolbar (slip)' module
8 - Enter content like below in the 'Print' transport:
Patron has [% borrower.holds.count %] holds

List of holds:
[% FOREACH hold IN borrower.holds %]
===============================
    Reserve id: [% hold.reserve_id %]
    Title [% hold.biblio.title %]
[% END %]
9 - Go to patron scree
10 - Note new option under 'Print'
11 - Print the new slip and confirm it works (try with and without
  placing holds for patron

Signed-off-by: Andrew Fuerste-Henry <andrewfh@dubcolib.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>