LP#1776003: show codes throughout the Physical Characteristics Wizard

LP#1776003: show codes throughout the Physical Characteristics Wizard

This patch extends on the previous one to show the code (as well as the
label) in all drop-downs used in the Physical Characteristics Wizard. It
also makes the drop-down text accessible for translations, in case there
are any locales where "code: label" is not preferred.

This patch also adds release notes.

To test
-------
[1] Apply the patches and use the web staff MARC editor to edit or
    create an 007 field, then use the Physical Characteristics Wizard.
[2] Verify that the drop-downs now display both the code and the label
    for each value.

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>