Fix <ReferenceInput> don't return currently selected choice when enableGetChoices returns false

[djhi]

Problem

When using the enableGetChoices prop of <ReferenceInput>, it won't return the currently selected record even though it was fetched.

Solution

• Return the currently selected record if present.
• Fix the existing test for enableGetChoices to also check the options passed to the ChoicesContext

How To Test

• Story
• It should display the current value (Leo Tolstoy)
• Clicking on the dropdown button should show an empty list of choices until 4 characters are entered (for instance baud)

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes unit tests (if not possible, describe why)
• The PR includes one or several stories (if not possible, describe why)
• The documentation is up to date

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