Merge pull request #25896 from edx/aj/branding/update-width-in-core

Update site width in core

lms/static/sass/base/_base.scss

@@ -131,8 +131,8 @@ a:visited:not(.btn) {
 }
 
 .content-wrapper {
+  margin: $baseline auto 0 auto;
   max-width: map-get($container-max-widths, xl);
-  margin-top: $baseline;
   padding: 0 0 $baseline/2;
 
   @include media-breakpoint-up(md) {

lms/static/sass/bootstrap/_layouts.scss

 // LMS layouts
-
 .content-wrapper {
   max-width: map-get($container-max-widths, xl);
-  margin-top: $baseline;
+  margin: $baseline auto 0 auto;
   padding: 0 0 $baseline/2;
 
   @include media-breakpoint-up(md) {