show backbtn on mine page if needed

Closes #1580

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/main/controller.dart

@@ -271,7 +271,7 @@ class MainController extends GetxController
         const Material(
           child: ViewSafeArea(
             top: true,
-            child: MinePage(),
+            child: MinePage(showBackBtn: true),
           ),
         ),
       );