adjust navbar border width

src/client/styles/scss/_variables.scss

@@ -7,7 +7,7 @@ $font-family-monospace-not-strictly: Monaco, Menlo, Consolas, 'Courier New', Mei
 
 //== Layout
 $grw-navbar-height: 52px;
-$grw-navbar-border-width: 3px;
+$grw-navbar-border-width: 3.3333px;
 
 $grw-sidebar-nav-width: 64px; // !!DO NOT CHANGE!! 'margin-left' for '.css-teprsg' is hardcoded
 $grw-sidebar-content-min-width: 240px;