Web library v1.2.17

Added

• The notificationLink setting.

Fixed

• Issue where the same notification would show more than 1x
• Issue where sometimes the client window won't open when clicking on a notification
• Issue in IE11 that prevented the chat from starting (document.contains() doesn't exists in IE11, document.body.contains() does)
• Another issue in IE11; Array.from() doesn't exists so i added the core-js es.array.from module polyfill