add details to phone workout view

Werkout_ios/CurrentWorkoutInfo.swift

@@ -20,6 +20,22 @@ class CurrentWorkoutInfo {
         return workout?.supersets?.sorted(by: { $0.order < $1.order }) ?? [Superset]()
     }
     
+    var numberOfRoundsInCurrentSuperSet: Int {
+        guard let workout = workout else { return -1 }
+        guard let supersets = workout.supersets else { return -1 }
+        
+        if supersetIndex >= supersets.count {
+            return -1
+        }
+        let currentSuperSet = supersets[supersetIndex]
+        
+        if exerciseIndex >= currentSuperSet.exercises.count {
+            return -1
+        }
+        
+        return currentSuperSet.rounds
+    }
+    
     var currentExercise: SupersetExercise? {
         guard let supersets = workout?.supersets else { return nil }