feat: add "keepOpen" property to/in autocomplete dropdown so it does not closes automatically after each selection

[lasbrojen]

🙋 Feature Request
Add "keepOpen" property to autocomplete dropdown so it does not closes automatically after each selection

https://www.fluentui-blazor.net/Autocomplete

🤔 Expected Behavior
When interacting with the autocomplete dropdown, I expect the selection list to remain open until I explicitly click outside of it. This would allow me to quickly browse and select multiple options without the need for reopening the dropdown each time.

Maybe Multiple="true" should result in this behavior?

😯 Current Behavior
Currently, the autocomplete dropdown closes automatically after each selection. This behavior requires me to reopen the dropdown every time I want to choose another option, which disrupts the flow and increases interaction time.

💁 Possible Solution
A possible solution would be to introduce a property (e.g., keepOpen) that can be set to keep the selection list open until the user clicks outside the dropdown area.

❤️

[dvoituron]

That could be a good improvement.

I don't know what is the best:

1. to add a new property KeepOpen or AutoClose
2. to use an existing property like MaximumSelectedOptions or Multiple to use this new behavior

[dvoituron]

See the PR #2829

[lasbrojen]

See the PR #2829

Thank you very much - have a nice weekend 🌞