1. Visually observe and make sure all components are styled and displayed correctly.
2. Check the behavior on `:hover` of buttons and the like.
3. Check component interaction on `:focus` and `:active`.

## Notes:

* The theme should look the same in each web browser, however there might be some minor quirks related to the engine of the browser like:
  * text not centered vertically (Firefox)
  * blurry icons (Firefox)
