Wait for data before displaying workouts on plans

Closes #92

StartPlan.tsx

@@ -166,6 +166,7 @@ export default function StartPlan() {
             innerRef={unitRef}
           />
         )}
+        {counts && distinctSets && (
           <FlatList
             data={workouts}
             renderItem={({item, index}) => (
@@ -174,7 +175,8 @@ export default function StartPlan() {
                 description={getDescription(item)}
                 onPress={() => select(index)}
                 left={() => (
-                <View style={{alignItems: 'center', justifyContent: 'center'}}>
+                  <View
+                    style={{alignItems: 'center', justifyContent: 'center'}}>
                     <RadioButton
                       onPress={() => select(index)}
                       value={index.toString()}
@@ -186,6 +188,7 @@ export default function StartPlan() {
               />
             )}
           />
+        )}
       </View>
       <Button mode="contained" icon="save" onPress={handleSubmit}>
         Save