Task/fp 862 load branding from cms

[wesleyboar]

Overview:

Load branding bar and nav bar logo from CMS.*

* CMS is not the long-term location to store header components, but at least the code is DRY-er this way than before.

PR Status:

• Ready.

Related Jira tickets:

FP-862

Related PRs:

• CMS Task/fp 862 load branding from cms #63
• Portal Task/fp 862 load branding from cms Core-Portal#334
• Docs https://bitbucket.org/taccaci/frontera-tech-docs/pull-requests/14

Summary of Changes:

• Minor: Use modern layout code* and a variable in branding_logos.css.
• New: Limit height of branding bar .branding-header and navigation bar .s-header.†
• New: Add functions to importHTML.js module (for Portal and Docs).

  Minor: While in here, I also fixed an error message and a comment.

• Minor: Rename template from branding.html to header.html.
• New: The header.html includes new header_logo.html and header_branding.html.
• New: The branding and logo are loaded from CMS using near-identical code.
• New: Added new URLs for loading header_logo.html and header_branding.html in isolation (for Portal and Docs).

* Not just modern for modern's sake; this code reduces the amount of pixel-perfect values necessary (let the browser do the math).

† Naming is not consistent. Saving that for a holy grail, something like #12 (which inches closer with every PR).

Testing Steps:

See TACC/Core-Portal#334.

UI Photos:

See TACC/Core-Portal#334.

Notes:

See TACC/Core-Portal#334.

[taoteg]

LGTM! I like header much better than branding... names with meaning? crazy!