Bug 7882: (follow-up) Only show sortable icon for sortable tags

Bug 7882: (follow-up) Only show sortable icon for sortable tags

Only tags which can be repeated can be sorted, so the "bars" icon should
not display by these tags.

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>
(cherry picked from commit 481d51c51c71ba41fc518cc52ba6aec777e3332c)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>