HtmlEditorField.js changes, mergeback from 3.2 (link popup)
HtmlEditorField.js changes, mergeback from 3.2 (link popup)

loyals-online/silverstripe-tinymce4,loyals-online/silverstripe-tinymce4,Mediaweb/silverstripe-tinymce4,Mediaweb/silverstripe-tinymce4