Generic Button: Improved error message for missing DisplayItem or CommandItem conversation.

Author: pre-martin

StreamDeckSimHub.Plugin/ActionEditor/ViewModels/SettingsViewModel.cs

@@ -204,7 +204,7 @@ private DisplayItemViewModel DisplayItemToViewModel(DisplayItem displayItem)
             DisplayItemImage img => new DisplayItemImageViewModel(img, _imageManager, this),
             DisplayItemText txt => new DisplayItemTextViewModel(txt, this),
             DisplayItemValue val => new DisplayItemValueViewModel(val, this),
-            _ => throw new InvalidOperationException("Unknown DisplayItem type.")
+            _ => throw new InvalidOperationException($"Unknown DisplayItem type: {displayItem.GetType().FullName}")
         };
     }
 
@@ -274,7 +274,7 @@ private CommandItemViewModel CommandItemToViewModel(CommandItem commandItem, Str
                 roleVm.SetAvailableRoles(_availableSimHubRoles);
                 return roleVm;
             default:
-                throw new InvalidOperationException("Unknown CommandItem type.");
+                throw new InvalidOperationException($"Unknown CommandItem type:  {commandItem.GetType().FullName}");
         }
     }