fix: mainnavigation placement in header w/o metanavigation (#496)

fix: mainnavigation placement in header w/o metanavigation #489

Author: mfranzke

source/_patterns/02-components/mainnavigation/mainnavigation.scss

@@ -10,6 +10,11 @@
 		order: 1;
 	}
 
+	// Header Components positioning, :has non-supporting browsers fallback
+	@supports not selector(:has(db)) {
+		margin: auto;
+	}
+
 	// The links shouldn't get an underline as text-decoration
 	.elm-link {
 		// We need to reset the general border-radius here

source/_patterns/03-areas/00-header/header.scss

@@ -15,8 +15,12 @@
 	padding-right: to-rem($pxValue: 16);
 
 	// We'll need to keep this for legacy reasons, to position the navigation even within a metanavigation included in header
-	&::after {
-		content: "";
+	&:not(:has(.rea-meta)) {
+		&::after {
+			content: "";
+			display: inline-block;
+			order: 3;
+		}
 	}
 
 	.elm-link {