FS#4533: Do not ask answer available question when Ckeditor is empty
FS#4533: Do not ask answer available question when Ckeditor is empty

Empty was previously defined as a completely empty string.
This has now been redefined so that if the editor does not contain
any "real" text (only HTML tags and/or whitespaces) then it is
considered empty.

cention/ferite-module-webframework,cention/ferite-module-webframework,cention/ferite-module-webframework