:bug: fix(drop-down): Option List overflows in mobile viewports

[GinaBiondo-aperto]

Current Behavior

The Option List for the dropdown span the full page in mobile viewports.
Viewports above 768px are fine.

Expected Behavior

The option list should not exceed the width of the dropdown.

Steps to Reproduce

regular usage of the dropdown component.
Behavior is present in Storybook as well.

Version

18.3.0

Browsers

Firefox, Chrome, Safari

Device

Mobile, Tablet, Desktop

Code Reproduction URL

http://design.baloise.dev/?path=/story/components-form-dropdown--basic&globals=framework:html

Additional Information

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[hirsch88]

In progress with the new typeahead component #1713

[hirsch88]

will close this ticket since it will be done with #1713