Added some error handling to the section tree

I18N Commander/UI WinForms/Components/SectionTree.cs

@@ -141,11 +141,15 @@ public partial class SectionTree : UserControl
         // Add the new section to the database:
         var addedSection = await SectionProcessor.AddSection(this.db, result.Text,  addRootNode ? null : selectedNode?.Name);
         
+        addedSection.ProcessError();
+        if(!addedSection.Successful)
+            return;
+        
         // Add the new section to the tree control:
         var node = new TreeNode
         {
-            Name = addedSection.DataKey, // [sic] name is the key
-            Text = addedSection.Name,
+            Name = addedSection.Result!.DataKey, // [sic] name is the key
+            Text = addedSection.Result.Name,
             StateImageIndex = 1,
         };
 
@@ -233,8 +237,12 @@ public partial class SectionTree : UserControl
         // Rename the section:
         var alteredSection = await SectionProcessor.RenameSection(this.db, selectedNode.Name, result.Text);
         
+        alteredSection.ProcessError();
+        if(!alteredSection.Successful)
+            return;
+        
         // Rename the selected node:
-        selectedNode.Text = alteredSection.Name;
-        selectedNode.Name = alteredSection.DataKey; // [sic] name is the key
+        selectedNode.Text = alteredSection.Result!.Name;
+        selectedNode.Name = alteredSection.Result.DataKey; // [sic] name is the key
     }
 }