Change todo re-add button icon and title

What does this MR do and why?

Change todo re-add button icon and title per linked issue (Clarify add to do action from To dos > Done list (#442480 - closed))

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Check out this branch in your GDK
2. Visit your Todos done tab (http://gdk.test:3000/dashboard/todos?state=done)
3. You should see that the redo icon is used on re-add buttons, and when you hover or focus the title of the button is Re-add this todo

Related to #442480 (closed) and #424397 (closed)