Fixed refreshing tag list after adding a tag (refreshTagList() doesn't work with the event parameters).

Lightbox: Added error handling in ajax call and button handling also for lightbox forms outside lightbox. Added also the possibility to ignore a form inside lightbox or a button inside lightbox form.

Include details about the url's in the VuFind.lightbox.login event so that different action can be initiated based on the values.

Don't use window.location.reload() to refresh the page because it would warn about any POST parameters (e.g. login right after changing language).

Added a login event to the lightbox to enable custom actions when a login is performed in a lightbox.

Isolate success messages from the html in lightbox first before trying to deframe it for success messages to work even if the isolation would not be successful.

Improved the clicked submit button detection to work on all platforms and cases where the form has multiple submit buttons.

- Bad interaction between Zend\Session\Container and proxy manager caused many notices.
- Came up with simpler mechanism for deferring Demo driver container instantiation.

Fixed fi and sv translation of Zip.

- Rewrote Javascript to make better use of server-side logic
- Eliminated many server-side special cases specific to lightbox handling
- Adjusted test suite to accommodate improvements

- Refactored use of Zend\Session\Container to inject proper session manager
- Introduced "on demand session container" mechanism for non-critical session data (only used by Demo ILS driver for now)
- Changed controllers to retrieve authorization service on demand rather than through injection (to defer session load)
- Replaced \VuFind\Controller\AbstractBase::writeSession() with \VuFind\Controller\AbstractBase::disableSessionWrites (and new related mechanism for safer AJAX session utilization)
- This makes sessions "on demand" which improves performance of requests that do not depend on session data (e.g. cover images, some AJAX calls).

corrects check for existence of ilslink

- Create generic (optional) caching mechanism in base class.
- Replace VoyagerRestful session-based caching with new generic mechanism.

- Thanks to @Cloud8 and @lahmann
- Resolves PR #612.