Better local preview for text-only emails

[silvagustin]

Problem

The company I work for decided to only use text emails and when we preview them locally, we always have the HTML div first with no HTML at all and we have to scroll down to reach the TEXT email body.

Solution

This was first addressed in an issue from Bamboo library which was already solved, but here on Bamboo Phoenix we still use and older version of Bamboo which doesn't has this change.

I believe that the solution is just to update some dependencies, and making sure that tests won't break.

Cheers.