WebKit initial request fix obstructs returning back to initial page

[VojtaSim]

After testing history extension for nette.ajax.js I've encountered an unwanted feature in fix discussed here: https://github.com/vojtech-dobes/nette.ajax.js/issues/73. When I click through some sections the plugin works just fine but when I navigate back through those sections I'm not able to load the initial page. This part of 'popstate' handler is suspicious:

var initialPop = (popped && initialUrl == state.href);
// console.log('popped: ' + popped + '\ninitialUrl: ' + initialUrl + '\nstate.href: ' + state.href);
popped = true;
if (initialPop) {
    return;
}

https://github.com/vojtech-dobes/nette.ajax.js/blob/master/history/history.ajax.js#L45

Explained:

• Initial loading and dump of variables
• Navigating through some sections
• 1st step back (load successful)
• 2nd step back (load prevented by mentioned fix because initialUrl == state.href)

My solution would be to add another variable containing true/false indication whether user has already loaded another page or not.