Adjusting RTL styles for UX-1628

lms/static/sass/shared/_header.scss

@@ -162,7 +162,7 @@ header.global {
         position: absolute;
         top: 4px;
         @include transition(all 0.15s linear 0s);
-        width: 26px;
+        width: 19px;
       }
 
       &:hover, &:focus {
@@ -299,11 +299,6 @@ header.global {
         @extend %m-btn-primary;
       }
     }
-
-    // logged in
-    &.authenticated {
-
-    }
   }
 }
 
@@ -335,7 +330,6 @@ header.global-new {
   @extend %ui-depth1;
   /* Temp. fix until applied globally */
   @include box-sizing(border-box);
-
   position: relative;
   width: 100%;
   border-bottom: 4px solid $courseware-border-bottom-color;
@@ -352,7 +346,7 @@ header.global-new {
   }
 
   h1.logo {
-    float: left;
+    @include float(left);
     margin: -2px 39px 0 10px;
     position: relative;
 
@@ -361,12 +355,12 @@ header.global-new {
     }
   }
 
-  .left {
-    float: left;
+  .nav-global {
+    @include float(left);
   }
 
   .guest {
-    float: right;
+    @include float(right);
   }
 
   > li {
@@ -436,7 +430,7 @@ header.global-new {
   }
 
   .user {
-    float: right;
+    @include float(right);
     margin-top: 4px;
 
     > .primary {
@@ -452,8 +446,8 @@ header.global-new {
 
       &:last-child {
         > a {
-          border-radius: 0 4px 4px 0;
-          border-left: none;
+          @include border-radius(0, 4px, 4px, 0);
+          @include border-left(none);
           padding: 5px 8px 7px 8px;
 
           &.shopping-cart {
@@ -485,7 +479,7 @@ header.global-new {
         position: absolute;
         top: 4px;
         @include transition(all 0.15s linear 0s);
-        width: 26px;
+        width: 19px;
       }
 
       &:hover, &:focus {
@@ -568,7 +562,7 @@ header.global-new {
   %default-header-nav {
     margin-top: ($baseline/4);
     list-style: none;
-    float: left;
+    @include float(left);
 
     li,
     div {
@@ -601,7 +595,7 @@ header.global-new {
 
   .nav-courseware {
     @extend %default-header-nav;
-    float: right;
+    @include float(right);
 
     div {
       display: inline-block;