Update plot specs to reflect refactoring out of formatter for telemetry values, WTD-599.
Complete specs for scrolling list views, WTD-534.
Fill in specs for ScrollingListController, and for the specific Column types that support it. Separate out the code that produces actual rows in order to improve testability and maintainability. WTD-534.
Add empty tests for scripts associated with the scrolling list view. WTD-534.