Add back to show menu on home

PlantBox.Client/PlantBox.Client/App.xaml.cs

@@ -11,6 +11,7 @@ namespace PlantBox.Client
     public partial class App : Application
     {
         public static SettingsViewModel Settings { get; private set; }
+        public static MainPage MasterPage { get; private set; }
 
         public App()
         {
@@ -24,7 +25,8 @@ namespace PlantBox.Client
                 Locale.Culture = Settings.Language;
             }
 
-            MainPage = new MainPage();
+            MasterPage = new MainPage();
+            MainPage = MasterPage;
         }
 
         protected override void OnStart()

PlantBox.Client/PlantBox.Client/Forms/HomePage.xaml.cs

@@ -27,5 +27,12 @@ namespace PlantBox.Client.Forms
 
             await Navigation.PushAsync(new PlantPage(plant));
         }
+
+        protected override bool OnBackButtonPressed()
+        {
+            App.MasterPage.IsPresented = true;
+
+            return true;
+        }
     }
 }