added param to make lollipop scale with carbs

@jebeck or @nicolashery Small change to make add param to make lollipop scale with carbs
I'm confused about your suggestion @cheddar. React `props` (such as the `queryParams`) are already immutable (and components such as `PatientData` are automatically reactive to them). Do you just disagree about where we're building the `chartPrefs` object (which gets passed down further as a `prop` to the `Chart` component)? IMO, it doesn't make sense to build it earlier than `patientData`, and by passing in the query parameters as a `prop` we can add query parameters without having to touch any code other than this component and any appropriate sub-component (i.e., whichever tideline view would be affected by the query parameter).

Speaking of which, @ianjorgensen, `chartPrefs` gets broken up by the `Daily` component, with only the relevant properties passed as props to `DailyChart`. This branch won't have any effect until you add the relevant props in `DailyChart` and add the property names to the `chartOpts` array in [line 181](https://github.com/tidepool-org/blip/blob/ianjorgensen/lollipopQuery/app/components/chart/daily.js#L181). (Everything behind the need for the `chartOpts` array is possibly not the best solution to putting together the full `opts` object that tideline expects, but we do have a challenge in assembling this from multiple sources (query parameters, (eventual) user toggles (i.e., for timezone) from other parts of blip, constants (i.e., the images URL)...).