Fix chart tooltip incorrect order

[JT-39]

Pull request overview

This is to fix issue #74 where the line chart tooltip is not in the correct order.

Pull request checklist

Please check if your PR fulfills the following:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Tests have been run locally and are passing (shinytest2::test_app())
• Code is styled according to tidyverse styling (checked locally with styler::style_dir() and lintr::lint_dir())

What is the current behaviour?

When the tooltip contains values which have a suffix (such as million or billion) this is can currently lead to an incorrect order of the tooltip (for line charts). This is due to the order taking the raw number value of the formatted number (and not taking into account the suffix).

What is the new behaviour?

This issue has now been fixed, the tooltip is ordered by the raw value before the formatting.

Anything else

I had to update {chromote} to get a number of the tests to work due to an error that was appearing:

⠏ |          0 | UI-01-basic_load                                    
Error in with_random_port(launch_chrome_impl, path = path, args = args) : 
  Cannot find an available port. Please try again.
Caused by error in `startup()`:
! Failed to start chrome. Error:
Old Headless mode has been removed from the Chrome binary. Please use the new Headless mode (https://developer.chrome.com/docs/chromium/new-headless) or the chrome-headless-shell which is a standalone implementation of the old Headless mode (https://developer.chrome.com/blog/chrome-headless-shell).

I also had to run the line:

options(chromote.headless = "new")

This came from a GitHub issue on the chromote repo- Chrome v132 no longer supports old headless mode #187