Select form field values are hidden at narrow screen widths in Claro theme

Problem/Motivation

At narrower screen widths, select form field values can disappear in Claro theme. Example:

Visible values at average width:

At a narrow width, the select element is too narrow and the values are hidden:

Steps to reproduce

1. Make Claro the admin theme
2. Go to an admin page that has select form fields such as manage fields or manage display
3. Make the browser window so narrow the select values are hidden
4. Expected result: select values are shown even at narrow screen widths

Proposed resolution

Update the CSS to handle narrower widths.

Remaining tasks

• Create patch
• Review patch
• Test patch
• Commit

User interface changes

Select form field values will be shown at narrower screen widths.

API changes

Data model changes

Release notes snippet