Fix window.location mistakes in previous code

Sorry guys, I commit the incomplete code. It should be window.location.assign(url);

However this is just tested in google chrome.

apps/files_versions/js/versions.js

@@ -32,7 +32,7 @@ $(document).ready(function(){
 });
 
 function goToVersionPage(url){
-	window.location(url);
+	window.location.assign(url);
 }
 
 function createVersionsDropdown(filename, files) {