add WorkoutIconSelector, change the way adding ExerciseTemplate works to in-List

WorkoutsPlus/Workout/Workout.swift

@@ -46,6 +46,7 @@ final class Workout {
 		}
 		
 		static let sampleData: [Workout] = [
-				Workout(name: "RR", exercises: Exercise.sampleData)
+				Workout(name: "Recommended Routine", exercises: Exercise.sampleData),
+				Workout(name: "Marathon Plan", exercises: Exercise.sampleData)
 		]
 }