Empty value ("") for option in Dropdown components makes selected option label blank

[ethernidee]

Discussed in https://github.com/orgs/primefaces/discussions/1639

Version: 4.0.0 beta

^{Originally posted by ethernidee April 10, 2024}
Given options [{ value: '', label: "Private" }, { value: "123", label: "Public" } ] for Dropdown component.

<Dropdown
  ...
  option-label="label"
  option-value="value"
</Dropdown>

Anytime user selects option with empty value, the value label is rendered as empty text, which is invalid. Opening dropdowns show valid option label in the list, but selected option caption will always be blank.