Login is broken on WebKit based browsers

[pavelhoral]

Login on WebKit based browsers does not work due to aborted request in SessionValidator.js.

What happens is that:

• after successful authentication with goto parameter, CommonConfig.js sets redirect URL via window.location.href
• few lines above that EVENT_AUTHENTICATION_DATA_CHANGED event is fired which in turn fires EVENT_AUTHENTICATED
• this starts session validation logic
• from this point on the processing differs in WebKit browsers

In non-WebKit browsers:

• session validation does not make any requests as the JS promise based processing is stopped after the navigation (setting window.location.href)

In WebKit browsers:

• session validation makes the HTTP request for getSessionInfo, however that request gets cancelled (probably due to the navigation in progress)
• SessionValidator is able to handle the request failure and navigates user to session expired error page

This issue started appearing probably after upgrading to newer jQuery with updated promise handling.