Various fixes before releasing

[JosephMarinier]

Description:

• Dashboard
  • Fix sorting numbers as strings
• One-line descriptions
  • Shorten behavioral testing description and remove duplication
  • Add description to Post-processing Analysis page
• Utterances table
  • Make proposed action selector wider in footer and narrower in column, making everything fit on a MacBook Pro 17.
  • The width of the selector in the table column is no longer hardcoded thanks to the fullWidth prop. The width in the table footer still needs to be fixed though, so I set it to the longest option "augment_with_similar".

Checklist:

You should check all boxes before the PR is ready. If a box does not apply, check it to acknowledge
it.

• PRE-COMMIT. You ran pre-commit on all commits, or else, you
  ran pre-commit run --all-files at the end.
• FRONTEND TYPES. Regenerate the front-ent types if you played with types and routes.
  Run cd webapp && yarn types while the back-end is running.
• USER CHANGES. The changes are added to CHANGELOG.md and the documentation, if they impact
  our users.
• DEV CHANGES.
  • Update the documentation if this PR changes how to develop/launch on the app.
  • Update the README files and our wiki for any big design decisions, if relevant.
  • Add unit tests, docstrings, typing and comments for complex sections.

[gabegma]

Thank you!!! All issues were fixed in the demo.