Bug 27655: Add barcode "columnname" to "column_settings.yml"

Bug 27655: Add barcode "columnname" to "column_settings.yml"

Preferences of the "Holds to pull" table missing the "Barcode" column.
This patch appends that column name to the "column_settings.yml"
in correct order. This also led to checked out columns in this settings
page that were not those which were hidden when the table displayed
(i.e. columns were shifted).

To reproduce:
    1) Head over to /cgi-bin/koha/admin/columns_settings.pl
    2) Open the collapsed "Circulation" list, go to the "Holds" page
and find preferences of the "Holds to pull" table there.
    3) Check that the "Barcodes" column is missing from it.
    4) Mark the last few columns for not to be
displayed (for example, three) and save the preferences.
Remember the column names you checked out.
    5) Open the circulations section, then open "Holds to pull" report
when you have there some elements displayed, you should notice that
hidden columns shifted by one, as well if you press "gear" icon to
quickly enable/disable the columns, you will see those unchecked in
list last three will be not those you marked out.
    6) Apply the patch.
    7) Reload the "table settings" page, check that the "Barcodes"
column is present.
    8) Check that on the "Circulation -> Holds to Pull" page all
columns hidden accordingly and properly (as explained in step 5.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>