Quiet Date Picker Range end field overlaps dash

[lazd]

Description

Steps to reproduce

1. Go to http://spectrum-css-archives.s3-website.us-east-2.amazonaws.com/2.14.0/docs/datepicker.html#rangequiet
2. Look with ye eyes, and see what I see

Expected behavior

Things don't overlap

Screenshots

Environment

• Spectrum CSS version: 2.14
• Browser(s) and OS(s): Chrome on macOS

[adobe-bot]

JIRA issue created: https://jira.corp.adobe.com/browse/SDS-4414

[lazd]

@GarthDB stealing this as it was a quick fix as part of #399