[Polish] Improve transitions between Narrow and wider VisualStates

[pingzing]

If we're sizing from a Wide State -> the Narrow State:

• If we have a Trip Result open, navigate to the Trip Result page with the current details.
• If we don't have a Trip Result open, just shrink it.

If we're sizing from a Narrow State -> Wide State

• If we're on the Trip Result page, navigate back to MainPage, but keep the Trip Result's state
• If we're on the Main Page, just shrink it

[pingzing]

Update: Let's change this, and push it to 1.2: Let's rework the Wide design a little bit, to match Jarno's mockup:

I.E, the following are individual controls with their own viewmodels:

• TripPlanForm
• TripPlanResult
• TripPlanResultDetails

and maybe the TripPlanResultDetails map gets to live in its own blade if the screen is wide enough.

In the narrow view we navigate between these as separate pages

OR

they're all hosted on the same page, but are separate controls with separate ViewModels, not crammed together the way that TripPlanResult and TripPlanDetails are today.