Bug 12691: Use Koha.Preference in Self-Checkout

Bug 12691: Use Koha.Preference in Self-Checkout

For calls to SCOUserJS, SCOUserCSS, OPACUserCSS, AllowSelfCheckReturns,
OpacFavicon, ShowPatronImageInWebBasedSelfCheck, SelfCheckoutByLogin

Sponsored-by: Catalyst IT
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Bug 12691: [FOLLOW-UP] Follow-up patch

This patch fixes merge conflicts and fixes the problems in Comment 7

QA tools complain about missing bracket, will be fixed in next followup
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Bug 12691: [FOLLOW-UP] Missing bracket

Patch adds bracket to template file (Comment 16)

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Bug 12691: [FOLLOW-UP] Fixing some logic

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Patches have been squashed for readability and 1 removal occurrence of
display_patron_image has been reintroduced.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>