DatePicker: On clicking outside the Datepicker window should be closed.

[Palashd55]

Hi Team,
It will be nice if during selecting Date and time from the datepicker window when a user clicks outside, the window should be closed.
Thanks.

[mayank99]

DatePicker does not handle any popover behavior (there is no "open"/"closed" state). You are expected to connect the DatePicker with your own popover (e.g. floating-ui) which will give you a way to handle outside clicks.

Alternatively, you can temporarily use our internal Popover. See this sandbox for an example of how to handle outside clicks (from iTwin/iTwinUI-react#674): codesandbox.io/s/itwinui-react-datepickerinput-vq3rmi

Note that Popover is marked internal and currently uses @tippyjs/react which we plan to migrate away from (#914), so the API will likely change in our next major release.