Combobox & Select: `isMulti` + `isInverse` has wrong focus color

[silvalaura]

Component: Combobox & Select

Description of bug: Combobox isMulti elements use the wrong focus color

Select isMulti

Steps to reproduce:

• Navigate to https://storybook-preview-dev--upbeat-sinoussi-f675aa.netlify.app/?path=/story/combobox--inverse&args=isMulti:true and select an item. Give it focus
• Navigate to https://storybook-preview-dev--upbeat-sinoussi-f675aa.netlify.app/?path=/story/select--inverse&args=isMulti:true and select an item. Give it focus

[nikitaorliak-cengage]

Cases that have been tested:

• Validate styles for basic Combobox and Select with the isMulti prop;
• Validate styles for Combobox and Select with isMulti and isInverse props;
• Create a new element and check its styles;
• Check all previous cases with a screen reader.