fix: autocomplete for combobox

[okadurin]

This pull request fixes a bug which I noticed in the lion-combobox component. First I will describe a bug and then there will be a section with explanation regarding the PR itself.

Bug description

Autocomplete feature is not being stable in multiple cases.

Case 1

Steps to reproduce

• Navigate to https://lion-web.netlify.app/components/combobox/use-cases/#validation (Validation section)
• Type m and wait until Mango autocompletion happens
• Type one more symbol o and wait until autocompletion disappears
• Type backspace 2 times to erase mo
• Type m and wait until Mango autocompletion happens
• Type one more symbol o and wait until autocompletion disappears
• Hit Enter

Actual result

The autocomplete feature replaces mo to Mango

Expected result

Autocompletion should not happen since there are no words in the combobox list which starts from mo

A gif with example

Case 2

Steps to reproduce

• Navigate to https://lion-web.netlify.app/components/combobox/use-cases/#validation (Validation section)
• Type m and wait until Mango autocompletion happens
• Type one more symbol a and wait until Mango autocompletion happens
• Type one more symbol k and wait until autocompletion disappears
• Hit Enter

Actual result

The autocomplete feature replaces mak to Mango

Expected result

Autocompletion should not happen since there are no words in the combobox list which starts from mak

A gif with example

Pull request description

To fix the issue the activeIndex of the lion-combobox should be set to -1 every time the unselection happens.
Note this is not the first iteration of the PR. I tried different approaches which might be more appropriate but those require more code updates and possible breaking changes which I don't want to bring without a discussion. F.e. there is a piece of existing code which sets activeIndex to -1 on every popup opening which means skip any active for all elements, but at the same time there is a unit test which tests setting active property programmatically before opening the popup. It seems this test doesn't make much sense for lion-combobox since any the active elements become non-active as soon as a popup opens. So supporting active state with closed combobox might be not a best idea.
If not having active elements with closed combobox is ok, then _handleAutocompletion might not be called on initial setup. Then only thing it does before opening a combobox popup is setting activeIndex (this can be ditched) and reset the model (this can be moved to another function).
Anyways we can discuss this and I can explain what I mean exactly in details.

[changeset-bot]

🦋 Changeset detected

Latest commit: 32077ac

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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@lion/ui	Patch

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