Improve global styles

[Amantini1997]

Description

Everytime we create a button from scratch, we need to set cursor: pointer, which should be implicit in the button component.
Also, changing the padding for something affects the box size as opposed to its content because, by default, box-sizing is set to content-box.

Suggested solution

In the global css file, set

button {
    border: none;
    cursor: pointer;
}
* {
    box-sizing: border-box;
}

Goal

• Make css writing less tedious

Tasks

• Apply those CSS styles to all the components
• Make sure components UI does not change after those changes