TINY-879: if keep_styles=false, wipe out any styles that are left over after cloning parent conainer
TINY-879: if keep_styles=false, wipe out any styles that are left over after cloning parent conainer

MediehusetTek/tinymce,tinymce/tinymce,adaptiffdesigns/tinymce,FernCreek/tinymce,gencer/tinymce,danielpunkass/tinymce,leofeyer/tinymce,adaptiffdesigns/tinymce,tinymce/tinymce,TeamupCom/tinymce,aduth/tinymce,gencer/tinymce,leofeyer/tinymce,FernCreek/tinymce,MediehusetTek/tinymce,danielpunkass/tinymce,TeamupCom/tinymce,tinymce/tinymce,danielpunkass/tinymce,aduth/tinymce,FernCreek/tinymce