LC: Auto-populate loadName + displayName

[IanLondon]

overview

Load name and Display name fields should pre-populate with default loadName/displayName using the labware creator functions. These are displayed as grey placeholder values in those fields. If a user enters text into the field, the placeholder (and the use of the default value) goes away. If the user deletes the contents of the field, the placeholder reappears and the default value will be used in the saved definition.

• Factor out labware creator functions from create(Ir)RegularLabware fns to use independently
• Placeholder & fallback value behavior

[IanLondon]

Closed in LC project branch. Changes to shared-data merged into edge via #3804