GH-4358: added undo event to a change in anchor tag
GH-4358: added undo event to a change in anchor tag

tinymce/tinymce,FernCreek/tinymce,FernCreek/tinymce,FernCreek/tinymce,danielpunkass/tinymce,tinymce/tinymce,TeamupCom/tinymce,TeamupCom/tinymce,danielpunkass/tinymce,tinymce/tinymce,danielpunkass/tinymce