Add examples of using lowercase variables in Constance Config

[smk4664]

What's Changed

Document the use of lowercase variables in App provided Constance Config.

This is a stepping stone in addressing #4530, it does not try to define a standard, but shows how we can support existing conventions.

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• Unit, Integration Tests
• Documentation Updates (when adding/changing features)
• Example Plugin Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design

[glennmatthews]

Looks reasonable to me. Did you manually test to confirm that the lowercase_example actually works? (I ask because all of the testing is naturally using @override_config, which I worry could have subtle differences from the actual Constance behavior.)

[smk4664]

Looks reasonable to me. Did you manually test to confirm that the lowercase_example actually works? (I ask because all of the testing is naturally using @override_config, which I worry could have subtle differences from the actual Constance behavior.)

Yep, I tested manually, and even tested in the plugin that I am implementing this in.