Add check to only add one button to tweet

[meandavejustice]

Description

• Duplicate buttons were being added after #193
• fixes #213

Checklist

Put an x in the boxes that apply

• [x] My commit is GPG signed.
• [x] If files added, I have modified bundle.sh and esbuild.js to ensure the new files are included in the package
• [x] I have added necessary documentation (if appropriate).