Fixed a bug where the program would get stuck trying to connect to an unconnected keyboard

Artemis/Artemis/Managers/KeyboardManager.cs

@@ -52,6 +52,8 @@ namespace Artemis.Managers
             if (!keyboardProvider.CanEnable())
             {
                 _mainManager.DialogService.ShowErrorMessageBox(keyboardProvider.CantEnableText);
+                General.Default.LastKeyboard = null;
+                General.Default.Save();
                 return;
             }
 

Artemis/Artemis/ViewModels/Flyouts/FlyoutSettingsViewModel.cs

@@ -126,9 +126,9 @@ namespace Artemis.ViewModels.Flyouts
 
         protected override void HandleOpen()
         {
-            SelectedKeyboardProvider = General.Default.LastKeyboard.Length > 0
-                ? General.Default.LastKeyboard
-                : "None";
+            SelectedKeyboardProvider = string.IsNullOrEmpty(General.Default.LastKeyboard)
+                ? "None"
+                : General.Default.LastKeyboard;
         }
     }
 }