Port TreeNodeCollectionEditor to core

eng/Localize/LocProject.json

@@ -167,6 +167,11 @@
                                               "CopyOption":  "LangIDOnName",
                                               "OutputPath":  ".\\src\\System.Windows.Forms.Design\\src\\System\\Windows\\Forms\\Design\\xlf\\"
                                           },
+                                          {
+                                              "SourceFile":  ".\\src\\System.Windows.Forms.Design\\src\\System\\Windows\\Forms\\Design\\xlf\\TreeNodeCollectionEditor.xlf",
+                                              "CopyOption":  "LangIDOnName",
+                                              "OutputPath":  ".\\src\\System.Windows.Forms.Design\\src\\Resources\\xlf\\"
+                                          },
                                           {
                                               "SourceFile":  ".\\src\\System.Windows.Forms.Design\\src\\System\\Windows\\Forms\\Design\\xlf\\DataGridViewCellStyleBuilder.xlf",
                                               "CopyOption":  "LangIDOnName",

src/System.Design/src/System.Design.Forwards.cs

@@ -27,6 +27,7 @@
 [assembly: TypeForwardedTo(typeof(System.Windows.Forms.Design.StringArrayEditor))]
 [assembly: TypeForwardedTo(typeof(System.Windows.Forms.Design.StringCollectionEditor))]
 [assembly: TypeForwardedTo(typeof(System.Windows.Forms.Design.TabPageCollectionEditor))]
+[assembly: TypeForwardedTo(typeof(System.Windows.Forms.Design.TreeNodeCollectionEditor))]
 
 // internal serializers
 [assembly: TypeForwardedTo(typeof(System.Windows.Forms.Design.ControlCodeDomSerializer))]

src/System.Windows.Forms.Design/src/Resources/SR.resx

@@ -804,6 +804,9 @@
   <data name="LocalizationProviderMissingService" xml:space="preserve">
     <value>The service {0} is required but could not be found.  If you have removed this service ensure that you provide a replacement.</value>
   </data>
+  <data name="BaseNodeName" xml:space="preserve">
+    <value>Node</value>
+  </data>
   <data name="BasicDesignerLoaderDifferentHost" xml:space="preserve">
     <value>The designer loader has already been loaded from another host.  You can only have one designer loader for each host.</value>
   </data>