Full height editor?

Hi there!

When I write the text of a campaign I'm always somewhat hindered by the side-by-side input and preview only spanning half the height of my browser viewport - with the lower half just sitting there unused and empty - forcing me to scroll around much more and have less of an overview of what I'm doing. Likewise, although I should know better by now, I regularly and instinctively reach out to drag the textarea field to occupy the full height (which works) - but as soon as I enter a single character in the editor, the height collapses down to half-height again (which feels very frustrating at some point :)).

Is there any chance the editor can be tweaked to make use of the full viewport height? For me personally 95% of what I do with keila is be on that page to write the newsletter, so for me this would be a big improvement (and I don't really see any drawbacks from implementing it, maybe it's even trivial depending on your existing CSS).

And: Thanks so much for keila, it's super cool!