Refactored input component to handle checkbox optionally

closes #15

I18N Commander/UI WinForms/Components/SectionTree.cs

@@ -110,15 +110,24 @@ public partial class SectionTree : UserControl
 
     private async void buttonAdd_Click(object sender, EventArgs e)
     {
-        var result = InputDialog.Show("Please type the desired section name.", "Add a section", "My next section");
+        var result = InputDialog.Show(new InputDialog.Options(
+            Message: "Please type the desired section name.",
+            Title: "Add a section",
+            Placeholder: "My next section",
+            ShowQuestionCheckbox: true,
+            QuestionCheckboxText: "Add a root node (i.e. ignoring the selected node)"
+        ));
+        
         if(result.DialogResult == DialogResult.Cancel)
             return;
+
+        var addRootNode = result.AnswerToQuestion;
         
         // Get the currently selected section as parent:
         var selectedNode = this.treeView.SelectedNode;
 
         // Add the new section to the database:
-        var addedSection = await SectionProcessor.AddSection(this.db, result.Text,  result.IsRoot ? null : selectedNode?.Name);
+        var addedSection = await SectionProcessor.AddSection(this.db, result.Text,  addRootNode ? null : selectedNode?.Name);
         
         // Add the new section to the tree control:
         var node = new TreeNode
@@ -128,7 +137,7 @@ public partial class SectionTree : UserControl
             StateImageIndex = 1,
         };
 
-        if(!result.IsRoot && selectedNode is not null)
+        if(!addRootNode && selectedNode is not null)
             selectedNode.Nodes.Add(node);
         else
             this.treeView.Nodes.Add(node);