Move FolderEditor to a separate file

CopyRelativePath.csproj

@@ -47,6 +47,7 @@
   <ItemGroup>
     <Compile Include="BaseCopyCommand.cs" />
     <Compile Include="CopyIncludeCommand.cs" />
+    <Compile Include="FolderEditor.cs" />
     <Compile Include="OptionPageGrid.cs">
       <SubType>Component</SubType>
     </Compile>

FolderEditor.cs

@@ -0,0 +1,17 @@
+// Copyright (c) mere-human. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System.Windows.Forms.Design;
+
+namespace CopyRelativePath
+{
+    // Note: A better alternative could be CommonOpenFileDialog
+    class FolderEditor : FolderNameEditor
+    {
+        protected override void InitializeDialog(FolderBrowser folderBrowser)
+        {
+            base.InitializeDialog(folderBrowser);
+            folderBrowser.Description = "Base Directory for Relative Path";
+        }
+    }
+}

OptionPageGrid.cs

@@ -10,16 +10,6 @@
 
 namespace CopyRelativePath
 {
-    // Note: A better alternative could be CommonOpenFileDialog
-    internal class FolderEditor : FolderNameEditor
-    {
-        protected override void InitializeDialog(FolderBrowser folderBrowser)
-        {
-            base.InitializeDialog(folderBrowser);
-            folderBrowser.Description = "Base Directory for Relative Path";
-        }
-    }
-
     public class OptionPageGrid : DialogPage
     {
         public const string ExtensionName = "Copy Path Extension";