Bug 30871: Add/expand title text for LDR/06 and 008 Type of material

Bug 30871: Add/expand title text for LDR/06 and 008 Type of material

This patch simply adds title elements or clarifies existing title elements to indicate how default
values are chosen

To test:
1 - Create new record in default editor
2 - Open leader helper, hover over "6-Type of record" and the dropdown
3 - Confirm notes make sense
4 - Open 008 helper
5 - Hover over 'Type of Material' and dropdown
6 - Confirm notes make sense

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 9912739231511441d54bec77ff04bbb561fdb93d)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit b18aeffc748d2532cc4bff3ba491c1a9776ee129)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>