Secondary button is sometimes first in focus on modals

## Description
When saving a copy of form answers in progress (or submitted) the modal that pops up has the "Cancel" button in focus by default.

## Expected behaviour

Since "Cancel" is the secondary action here and "Save" is the primary action that most people will intend to take, might we consider having it displayed first and in focus to allow users to simply click / tap enter to continue toward their goal? Or could the "Save" be the first thing in focus?

## Steps to reproduce
1. Go to Form with save progress
2. Click on "Save to device"
3. Continue on to submit
4. Download a copy of answers
5. See the modal in both cases

## Details
- **Browser**: Chrome
- **Operating system**: Mac
- **Environment**: Production
- **Language**: English and French
- **Viewport**: Desktop
- **Output**: ex: https://forms-formulaires.alpha.canada.ca/en/id/cm98mduls000yyd01jwibk2bn

## Screenshots or videos

## Additional context

This might be the case for all "modal" type interactions