Style updates

Hi @seanbarclay, I've applied your CSS updates. Thanks! 

Couple of things:
- I added the @red bg for the Query Options header option, but had to pad it a bit.
- can I add the same bg for API Url as well? 
is there a special reason not to use `this.$('.my-class')` ? When I read these global selectors i always have no clue where the other element is located (maybe in another module/view?)