Smoth screen changes. Step 1

lib/screens/faq.dart

@@ -76,10 +76,7 @@ class FAQScreen extends BaseScreen {
 
 class FAQScreenState<T> extends BaseState<FAQScreen> {
 
-  FAQScreenState(this.returnToScanner, SqliteHelper helper, String app) {
-    this.helper = helper;
-    this.app = app;
-  }
+  FAQScreenState(this.returnToScanner, SqliteHelper helper, String app) : super(helper, app);
 
   bool returnToScanner;
 
@@ -129,18 +126,18 @@ class FAQScreenState<T> extends BaseState<FAQScreen> {
     if (data == null) {
       return getBackground();
     } else {
-      return new WillPopScope(onWillPop: onWillPop, child: new ListView.builder(
+      return new ListView.builder(
           itemBuilder: (BuildContext context, int index) =>
           new EntryItem(data[index]),
-          itemCount: data.length));
+          itemCount: data.length);
     }
   }
 
-  onWillPop() {
-    if(returnToScanner) {
-      return startScanner(context, app, helper);
-    } else {
-      return true;
-    }
-  }
+//  onWillPop() {
+//    if(returnToScanner) {
+//      return startScanner(context, app, helper);
+//    } else {
+//      return true;
+//    }
+//  }
 }