Improve display of past arrival departures in stop view controller

[ualch9]

When looking at a busy stop, the first page shows only past arrDeps which could be confusing for the user.

Potential fixes:

• Be "smart" on whether to display a past arrDep. Factors could be:
  • how many past arrDeps will display
  • if there are any duplicates of the same route
  • etc.
• Show a [Jump To] button (mock below)
• Put past arrDeps into a separate collapsible section, save user state if they choose to collapse.
• Show an option to hide arrDeps somewhere on the view controller