Show a warning when clicking 'I fixed it' if embedded Rapid editor has unsaved changes

[jake-low]

Fixes #2162

When completing a task (i.e. clicking "I fixed it", "Can't complete", etc, all of which would advance to the next task), a confirmation window will now be shown if there are unsaved changes in the embedded Rapid editor. The confirmation is very basic (I just used window.confirm()) but should help prevent users from accidentally advancing to the next task without uploading their changes. I considered trying to make a more complex/styleable modal but decided not to for now since with my limited experience with the codebase it would have taken longer and might not have matched the existing design language that I'm still getting familiar with.

Screen.Recording.2024-08-08.at.10.11.52.AM.mp4

Tested:

1. The confirmation window is shown if there are unsaved changes in Rapid and the user clicks any of the buttons in the completion widget.
2. The confirmation window is not shown if there are no unsaved changes in the Rapid editor. This includes the scenario where the user did not interact with the Rapid editor at all before clicking a button. I was unable to test the scenario where the user saves their changes in Rapid, because my dev environment throws an unspecific error when I try to save. Is this a configuration issue I should look into?
3. The confirmation window is not shown if the embedded Rapid editor is not running.