Don't call `onSuggestionSelected` when list is hidden and enter key is pressed

[OliverJAsh]

https://codepen.io/OliverJAsh/pen/ZEEOoZq?editors=0011

Steps to reproduce:

1. Focus on the input field
2. Type c
3. Escape/dismiss suggestions
4. Now the suggestions list is hidden, press enter

Observed behaviour:

• onSuggestionSelected is invoked at step 4, even though the list is hidden (see console logs).
• The first suggestion in the hidden list is selected ("test") and the input value is updated

This doesn't seem like intuitive behaviour—how can something that is hidden be selected?

Expected behaviour: no suggestion is selected at step 4

Related: https://github.com/moroshko/react-autosuggest/issues/483

IIUC, we can workaround this by clearing the suggestions when a selection is made (via onSuggestionsClearRequested). However, this is not always desirable—we may want to keep the suggestions in state so they can be immediately shown again when the input regains focus.

[dsaw]

Interesting. This issue doesn't seem to come up when using an async function to fetch results, probably because the list is fetched every time input is changed & no value corresponds to an empty suggestion list.