Probably as a result of recent changes in the way how forms client side
validators are trigerred (MDL-52826), the field validator has been
triggered before the underlying textarea's values property is updated by
TinyMCE. This led to marking such a field as "required" even if the
value is provided.
Inspired by http://stackoverflow.com/questions/2122085/
this patch adds a new onchange callback that automatically keeps the
underlying textarea synced with the editor iframe. Relevant API docs:
http://archive.tinymce.com/wiki.php/Configuration3x:onchange_callback
I was also trying to call the save() method via the editor's onSubmit
method but that one seems to be also triggered only after the validator.
34321d491b