LPS-34903 Make console textarea bigger --> please, read comments

Hey Nate, 

@sustacek sent me this pull, and I am not completely sure if this is the way to go about this... I tend to think that this css could be more generic (a wider and bigger textarea using percentage) and it could go in the styled theme but I don't know where to put it. We have something very similar when editing the js of a page in manage page.

what do you think?