On Page load use replaceState instead of pushState

Fix T50797 and replace the id-based url with a custom url for page in the browser's history.

src/templates/nodes/custom/page/view_embed.jade

@@ -34,11 +34,10 @@ script.
 	// skip the project-level displayNode push.
 	
 	var url = '{{ node.properties.url }}'
-	var push_state = {nodeId: '{{node._id}}', url: url};
-	// console.log('Pushing state ', push_state, ' with URL ', push_url);
-	window.history.pushState(
-		push_state,
-		'{{node.properties.url}}',
+	var replace_state = {nodeId: '{{node._id}}', url: url};
+	window.history.replaceState(
+		replace_state,
+		'{{node.name}}',
 		url
 	);
 	// Generate GA pageview