[CKE5] Make Modify table attributes filter work with CKE5

Patch fixes the issue and now I can change my text format to CKE5.

I'll admit to not fully understanding this one but I think the change makes sense?

FilterInterface::TYPE_TRANSFORM_IRREVERSIBLE — Irreversible transformation filters. The filter performs a transform for which a WYSIWYG plugin does not exist to perform the transformation client-side (especially, the reverse of it); instead, the WYSIWYG editor displays the unfiltered text. For example, Token Filter.

Thanks for testing this one and will just take your word on it :)

Automatically closed - issue fixed for 2 weeks with no activity.