Improve Normalize CSS

[devenini]

Fix current issue of _normalize.scss overriding styling of different tags e.g.

// Remove list styles on ul, ol elements with a class, which suggests default styling will be removed
ul[class],
ol[class] {
    margin: 0;
    padding: 0;
    list-style: none;
}

...

// Remove a elements default styles if they have a class
a[class] {
    color: inherit;
    text-decoration: none;
}