Update InputfieldTextLength.js to work with InputfieldTinyMCE

[elabx]

Currently the word count is not updated while typing on the TinyMCE editor as it is now with CKEditor. Also, while testing TinyMCE's word count, it seems to throw a different number which seems to give a better estimate, here is a norred down example I made:

Code is:

[ryancramerdesign]

@elabx Since TinyMCE has the word count built in, is there any reason to use the InputfieldTextLength version? The InputfieldTextLength is really more intended for plain text fields rather than rich text. So I'm wondering if maybe the best bet is just to disable the option from being selected for TinyMCE?

[elabx]

I agree! Not sure if there is any other backend validation for this?

Maybe it would be nice to flag the Inputfield with an error, like the Input character limit does. Although this would have to work with words not characters? Something I liked about the previous counter is that it gave live feedback about reaching a character count limit. I think it showed the limit in red?

I guess TinyMCE could write it's count to a hidden input or similar but unfortunately I cannot find any docs about customizing the wordcount Tiny plugin.