Bug 26361: switch TableSettings to ColumnSettings

Bug 26361: switch TableSettings to ColumnSettings

Test Plan:
-Be on 20.05.x
-Go to returns.tt
-See the error Uncaught SyntaxError: expected expression, got keyword 'var'.
-Apply patch
-Reload returns.tt, no error

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 2b6b7cb265acc77f8925eec9a9f315f249a85348)

Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>