Added a dialog popup when month practice is complete

lib/pages/practice/month/MonthPracticePage.dart

@@ -157,6 +157,51 @@ class _MonthPracticeState extends State<MonthPracticePage> {
     );
   }
 
+  Future _finishedPractice() {
+    showDialog(
+      context: context,
+      child: SimpleDialog(
+        title: Text("Practice Complete!"),
+        contentPadding: EdgeInsets.all(50),
+        children: <Widget>[
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: <Widget>[
+              Text("Rounds of Practice:"),
+              Text(_startCount.toString())
+            ]
+          ),
+          Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: <Widget>[
+                Text("Correct:"),
+                Text(_correct.toString()),
+              ]
+          ),
+          Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: <Widget>[
+                Text("Incorrect:"),
+                Text(_incorrect.toString()),
+              ]
+          ),
+          Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: <Widget>[
+                Text(
+                  (_correct / _startCount * 100).round().toString() + "%",
+                  style: TextStyle(
+                    color: (_correct / _startCount * 100) > 70 ? Colors.green : Colors.red,
+                    fontSize: 30,
+                  )
+                ),
+              ]
+          ),
+        ]
+      )
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     PracticeSetup setup = ModalRoute.of(context).settings.arguments;
@@ -217,6 +262,7 @@ class _MonthPracticeState extends State<MonthPracticePage> {
     _count += 1;
     answers.add(MonthPracticeAnswer(_month, answer));
     if((_startCount - _count) == 0) {
+      _finishedPractice();
       Navigator.pop(context);
       return;
     }