Admin WYSIWYG upgrade to latest Tiny MCE 4.*

[darrenjennings]

On latest mangeto version, would love to see TinyMCE upgraded and maintained since Magento is several versions behind latest TinyMCE. https://www.tinymce.com/

Newest version should include integration with image uploading/resizing/editing, magento widget/variable insertion etc.

I've attempted to upgrade the core myself so as to offer a PR, but it broke too many things along the way. :)

[darrenjennings]

I was able to get TinyMCE 4 working with Magento 1.7. Will post a PR here if I have time to get it working with Magento2.

[pboisvert]

thanks @darrenjennings new features in the latest version look really interesting so I'd imagine a PR would be very valuable for the community

@tkacheva please review in context of upcoming CMS work

[piotrekkaminski]

Thank you for your submission.

We recently made some changes to the way we process GitHub submissions to more quickly identify and respond to core code issues.

Feature Requests and Improvements should now be submitted to the new Magento 2 Feature Requests and Improvements forum (see details here).

We are closing this GitHub ticket and have moved your request to the new forum.

[magento-team]

Internal ticket to track issue progress: MAGETWO-69234