Accept all / Reject all buttons

[pbspm01]

Is your feature request related to a problem? Please describe.
If there are multiple checkboxes on the cookie bar then it is not a good user experience to check/uncheck all.
Having a quicker method would improve the user experience.

Describe the solution you'd like
Optional "Accept all" and "Reject all" buttons - with configurable styles so it is easy to distinguish them.
When The buttons are pressed, the checkboxes are filled in accordingly, and the form is submitted.

Describe alternatives you've considered
The alternative is the current solution we have.

Additional context
The possibility to have the "Accept all" button increases the chance that users allow more cookies out of mere convenience. Similarly, the "Reject all" is saving some time for those that are more careful.