fixing back button behaviour and playing nice with History API

public/src/ajaxify.js

@@ -67,9 +67,8 @@ var ajaxify = {};
 		}
 
 		if (templates.is_available(tpl_url) && !templates.force_refresh(tpl_url)) {
-			//if (quiet !== true) {
 			if (window.history && window.history.pushState) {
-					window.history.pushState({
+				window.history[!quiet ? 'pushState' : 'replaceState']({
 					url: url
 				}, url, RELATIVE_PATH + '/' + url);
 
@@ -86,7 +85,6 @@ var ajaxify = {};
 					}
 				});
 			}
-			//}
 
 			translator.load(tpl_url);
 
@@ -114,7 +112,7 @@ var ajaxify = {};
 
 					if (hash) {
 						require(['forum/topic'], function(topic) {
-							topic.scrollToPost(hash.substr(1))	
+							topic.scrollToPost(hash.substr(1));
 						});
 					}
 				});