Make footer buttons match other buttons on site

[joshdarby]

Changes

This pull request makes the following changes:

• Updates the styling for the buttons in the footer so they match the styling of other buttons on the site

Desktop:

Mobile:

Why

For #39 / client request

All looks good, but can the DONATE and SUBSCRIBE be styled like the rest of our buttons on site? The text for those looks really large, if the the subscribe can say SIGN UP and be an orange button and the donate in our publicsource blue (#418CFF) that would be awesome. Thanks!

Testing/Questions

Features that this PR affects:

• Footer donate/subscribe buttons

Questions that need to be answered before merging:

• [ ] Is this PR targeting the correct branch in this repository?

Steps to test this PR:

1. Add a Largo Donate widget to the Footer 2 widget area
2. Add a custom HTML widget to the Footer 2 widget area with this text

   <div class="footer-subscribe-container">
   <a class="btn btn-primary btn-subscribe" href="/subscribe/">SIGN UP</a>
   </div>

3. View on desktop and mobile