Enhanced IO issue handling when generating output

I18N Commander/UI WinForms/Components/SectionTree.cs

@@ -331,7 +331,9 @@ public partial class SectionTree : UserControl
         }
 
         this.buttonGenerate.Enabled = false;
-        await Generator.TriggerAllAsync();
+        var result = await Generator.TriggerAllAsync();
+        result.ProcessError();
+        
         this.buttonGenerate.Enabled = true;
     }
 }

I18N Commander/UI WinForms/ExtensionsError.cs

@@ -6,7 +6,8 @@ public static class ExtensionsError
 {
     public static void ProcessError<TResult>(this ProcessorResult<TResult> result)
     {
-        if (result.Successful) return;
+        if (result.Successful)
+            return;
 
         MessageBox.Show(result.ErrorMessage, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }