I missed the second part of this. It is already possible to "squash" the headers on select cards. Just do into the ballot/card editor and change the size of the header box. The text will squash. Be warned however that squashed text can look a bit strange if taken to extreme. Squashing is usually useful when cutting down the size of very tall referendum text, where you wouldn't notice a 1/4-1/2" change over the 3-4" text height.