* ext.confirmEdit.CaptchaInputWidget.js:
Based on code from ve.init.mw.CaptchaSaveErrorHandler.js
* ext.confirmEdit.CaptchaInputWidget.less:
Based on code from mw/ext/VE repo in ve.ui.MWSaveDialog.css
* ConfirmEditHooks.php:
Based on code from mw/ext/VE repo in VisualEditorHooks.php
Change-Id: I6605017fd31a4f96c529dd0beb69e9f4433cebc1