set readonly flag of ckeditor instance after instance ready, closes #2057
set readonly flag of ckeditor instance after instance ready, closes #2057

rolembergfilho/Serenity,volkanceylan/Serenity,rolembergfilho/Serenity,WasimAhmad/Serenity,rolembergfilho/Serenity,rolembergfilho/Serenity,volkanceylan/Serenity,volkanceylan/Serenity,WasimAhmad/Serenity,WasimAhmad/Serenity,WasimAhmad/Serenity,volkanceylan/Serenity,WasimAhmad/Serenity,rolembergfilho/Serenity,volkanceylan/Serenity