forgot to push for a while, got drag-and-drop mostly working

ContextMenu.tscn

@@ -0,0 +1,22 @@
+[gd_scene load_steps=2 format=3 uid="uid://d4hfi3b6ysauo"]
+
+[sub_resource type="CSharpScript" id="CSharpScript_u6vwj"]
+script/source = "using Godot;
+using System;
+
+public partial class ContextMenu : PopupMenu
+{
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
+"
+
+[node name="ContextMenu" type="PopupMenu"]
+script = SubResource("CSharpScript_u6vwj")