V8 UI - umb-sticky-bar corrected width and height set by JS.

src/Umbraco.Web.UI.Client/src/common/directives/components/umbstickybar.directive.js

@@ -119,9 +119,9 @@ Use this directive make an element sticky and follow the page when scrolling.
             }
 
             function calculateSize() {
+                var width = bar.innerWidth();
                 clonedBar.css({
-                    width: bar.outerWidth(),
-                    height: bar.height()
+                    width: width
                 });
             }
 

src/Umbraco.Web.UI.Client/src/less/components/editor/subheader/umb-editor-sub-header.less

@@ -7,6 +7,7 @@
    margin-top: -10px;
    position: relative;
    top: 0;
+   box-sizing: border-box;
 
     &.nested {
         margin-top: 0;