feat/tup-627 Migrate s-header to core-styles

[R-Tomas-Gonzalez]

Overview

Migrate s-header to core-styles

Related

• TUP-627

Changes

• Removed s-header from tup-ui
• https://github.com/TACC/Core-Styles/pull/249

Testing

– Use Core-Styles to test all changes on header

UI

Screenshots of changes:

Font Size, Font Weight, Letter Spacing	before	after

Height at screen-size 992px	before	after

Header and navbar-collapse, align-items: stretch	before	after

Nav-items and nav-link	before	after

Nav-bar and nav-link at screen-size 992px	before	without	after

Navbar Brand	before	after

Navbar Item hover, focus states	before	after

Navbar Item active state	before	after