Update navigation to accordian-style menu

- New navigation provides intuitive structure for showing relationship
between sections and pages
- Menu keeps an open state, which allows easy clicking to sibling pages
- Ability to preview all page sections w/o hover over blocking page content
- Allows user to see where they are within navigation at all times

Tested: Opened each page and confirmed new navigation worked, clicked through
to all pages successfully.

Change-Id: Ie10dc95d8e15ee9bf89a3bec9ff231c0a7065ed9
Signed-off-by: Kathy Pine <kathryn.elainex.pine@intel.com>
diff --git a/app/common/styles/layout/content.scss b/app/common/styles/layout/content.scss
index f5d2757..143c52a 100644
--- a/app/common/styles/layout/content.scss
+++ b/app/common/styles/layout/content.scss
@@ -1,12 +1,11 @@
 // Content layout styles
-$nav__toplvlWidth: 120px;
-$nav__seclvlWidth: 240px;
+$nav__toplvlWidth: 240px;
 
 // Main element class
 .content__container {
   margin-left: $nav__toplvlWidth;
   padding: 1em 0.1em;
-
+  margin-top: 130px;
   @include mediaQuery(x-small) {
     padding: 1rem 2rem;
   }