Fix some js errors, see diff

set sophia_after_dark_enable_top_header always to false, as it would a a bar to the top of the page below the admin bar
also did some general fixing on php :)

header.php

@@ -71,7 +71,7 @@ do_action( 'sophia_after_dark_before_page' );
 
 	<?php
 	// Top Header
-	if ( get_theme_mod( 'sophia_after_dark_enable_top_header', true ) ) {
+	if ( get_theme_mod( 'sophia_after_dark_enable_top_header', false ) ) {
 		do_action( 'sophia_after_dark_top_header' );
 	}