Modern h1 fixes.

#747

modern-business/sass/typography/_headings.scss

@@ -65,10 +65,10 @@ h6 {
 }
 
 h1 {
-	font-size: $font__size-xl;
+	font-size: $font__size-lg;
 
 	@include media(tablet) {
-		font-size: $font__size-xxl;
+		font-size: $font__size-xl;
 	}
 }
 

modern-business/style-editor.scss

@@ -94,10 +94,10 @@ h6 {
 }
 
 h1 {
-	font-size: $font__size-xl;
+	font-size: $font__size-lg;
 
 	@include media(tablet) {
-		font-size: $font__size-xxl;
+		font-size: $font__size-xl;
 	}
 }