Bug 9468: use new SUGGEST_FORMAT list

Bug 9468: use new SUGGEST_FORMAT list

This patch uses the new SUGGEST_FORMAT authorized value list for
populating the list of suggestion item types/document types.  It
also improves the display by using the staff or OPAC description of
the authorised value rather than the code.

To test:

[1] Enter a suggestion via the OPAC and select an item type (which
    I will call "desired format" for the rest of this test plan).
[2] Verify that the saved suggestion displays the desired format
    description in both staff and OPAC.
[3] Verify that organizing the list of suggestions by item type
    now works in the staff interface, rather than displaying "Unknown"
    in each tab header.
[4] Verify that existing suggestions' desired formats are displayed
    correctly.
[5] Verify that suggestions can have their desired format edited
    in the staff inteface.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>