Add wysiwyg editor to card descriptions too

[adrienjoly]

Requested by Gautham:

I have been using your Trello Comment Editor and its Awesome. Editing notes is so much easier with your power up. Very Useful.

I have one suggestion.
Can you implement the same editor for Description field too.

The reason I am asking is that Changes made to description field can be tracked and notifications are sent to Slack too whereas history of Trello Comments are not logged by Trello and no Notification is sent to Slack for any changes made to comments.