Fixes header styling issue introduced in SOL-734 (#8389) by reverting heights to what they were before that PR

Following are done in this PR
1-The controls to edit the form fields were hyperlinks, added button and required css to
  make it look like hyperlink.
2-label added when swap to combobox
3-Non breaking spaces added with dashes.

ECOM-1339 minor CSS tweaks for the footer. It now extends the full width of the browser and fixes issues with link hover states.

Serve branded footer JSON/HTML/CSS/JS from an API endpoint
in the branding app.  Refactor OpenEdX and EdX.org footer templates
to use the Python version of the API, ensuring that the API
values are consistent with the footer included in main.html.

Detailed changes:

* Added footer API end-point to the branding app.
* Footer API allows the language to be set with querystring parameters.
* Footer API allows showing/hiding of the OpenEdX logo using querystring parameters.
* Deprecate ENABLE_FOOTER_V3 in favor of the branding API configuration flag.
* Move no referrer script into main.html from the edx footer template.
* Rename rwd_header_footer.js to rwd_header.js
* Cache API responses.

Authors:
Awais Qureshi, Aamir Khan, Will Daly

ECOM-1547 created new template and Sass file for new footer. Wrapped it in a feature flag and updated previously named footer-edx-new.html to footer-edx-v2.html to better track/name updates to the footer going forward.
ECOM-1547 removed data-updated attributes from body
ECOM-1548 added JS file that inits analytics event listener and makes ajax call to API to get footer and HTML and add it to the DOM
ECOM-1547 code review cleanup
ECOM-1547 rebase and Sass appraoch update after @talbs the IE9 killer slayed the mighty beast.
ECOM-1547 updated file names and added comments in light of @talbs review of PR
ECOM-1547 update to social media link styles and nav link order
ECOM-1547 updated SOCIAL_MEDIA_FOOTER_NAMES if ENABLE_FOOTER_V3 is true
ECOM-1547 added translations to screenreader text
ECOM-1547 fixed test and renamed files in line with @talbs's pending PR
ECOM-1547 cleaned up file naming

* simplifying edx.org breakpoints to use min-width
* creating -bp-* centric Sass variables
* converting all existing edx.org centric media queries to use new Sass variables

ECOM-1457

TNL-1660

TNL-1759

TNL-1502

TNL-1499

(SOL-531)(SOL-532)Course Cards update; A link to course discovery page has been added to the OpenEdX homepage

Update <nav> elements to correctly group links
for screen readers.

Fix RTL display issue with responsive header
on the login/registration page.

CSS background image was used for the home icon at upper right corner
so when user enter high contrast mode or disable bakground image it
disapear so moved it to DOM element

TNL-1382

TNL-1336

Fix link stylings in LMS and CMS footers

Allow configuration to override links to mobile app stores

Remove Jobs, News
Change "Vision" to "About"

SASS compilation variable conventions update, focusing on basic colors, baseline variable usage for padding and margins, ui-depth extends, along with other small fixes. The intent with this is to not have any user-facing impact, and instead move us closer toward having files that use our newer sass conventions.