Add a "read more" option for newsletter content (not just blogs).

For example, a roll-down/roll-up feature where the text in the newsletter but is hidden and with a click will appear/disappear. This is best because when the newsletter is archived its complete content is archived. Yes, I can do it completely manually (by adding links to website pages), but it would not be possible to archive the newsletter. Having such a user-friendly add-on would enhance the value of MailPoet. Thank you.