return icon, purchases sort

lib/base/base_state.dart

@@ -81,7 +81,7 @@ abstract class BaseState<T extends StatefulWidget> extends State<T> {
     if(showReturnScreen()) {
       menuItemList.add(new PopupMenuItem(
         value: 3,
-        child: getMenuItem(exit_png, StringsLocalization.returnLabel())
+        child: getMenuItem(return_png, StringsLocalization.returnLabel())
       ));
     }
 

lib/network.dart

@@ -116,7 +116,7 @@ Future<Response> getUserPurchases(String token, int userId, int page) async {
   };
 
 
-  var finalEndpoint = "${await getEndpoint()}users/$userId/purchases/?returned=false&page=$page";
+  var finalEndpoint = "${await getEndpoint()}users/$userId/purchases/?returned=false&sort=desc&page=$page";
   print(finalEndpoint);
 
   return httpClient.get(finalEndpoint, headers: headers);

pubspec.yaml

@@ -42,6 +42,7 @@ flutter:
     - assets/settings_arrow.png
     - assets/help.png
     - assets/check.png
+    - assets/return.png
     - assets/exit.png
     - assets/activate_token_message_background.png
     - assets/active_token_message_background.png