Alex Younger

Results 2 issues of Alex Younger

![image](https://user-images.githubusercontent.com/61510135/111079763-c69ad800-84d1-11eb-9b44-ebd89f10ce9e.png) The labels for these inputs should be centered vertically so it's clear which number selector they are pointing at.

bug

Related to #113: Add `cursor: pointer;` to all button elements in the App.css root selector. This improves accessibility throughout our app.

refactor