Have a quick and easy plan to gather metrics about how the donation campaign goes

• Conversion rate on the donation page with the old page and the new page.
  • Conversion rate on the donation page before and after the campaign.
  • Where are people coming from?
    • Twitter
    • tweet templates
    • tails-bugs
    • sidebar
    • /home

Parent Task: #9855 (closed)

Original created by @sajolida on 11727 (Redmine)