TINY-1845: fix issue with mutating array
TINY-1845: fix issue with mutating array

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