CSS Refactor

[Cubified]

Administrative Info

[GitHub Issue N/A]

Changes

What changes did you make?

• Cleaned up and refactored the entire project's CSS -- the main changes made are:
  • Added a custom <Modal /> component that removes the need for duplicate CSS for similarly-styled modals on different pages (e.g. wish granting, profile, manage, etc. all had duplicate CSS for their modals)
  • Added global classes and styles for common theming elements (e.g. font-family: "Lato", sans-serif, buttons, text inputs, flexboxes, etc.)
  • Removed any duplicate, obsoleted, or otherwise unnecessary CSS and JS (altogether around 600 lines)

Testing

How did you confirm your changes worked?

• Manual testing to ensure style changes did not break anything site-wide
• More testing should be done to ensure no odd side-effects have come about

Confirmation of Change

This PR doesn't have any noticeable changes (other than minor layout/sizing/consistency fixes).

[Cubified]

This is largely obsoleted by #93, but I'm keeping it open because it cleans up a few more things that might be worth doing later on.