Add support for selecting prompt items

Closes #447

src/Spectre.Console/Extensions/StackExtensions.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+
+namespace Spectre.Console
+{
+    internal static class StackExtensions
+    {
+        public static void PushRange<T>(this Stack<T> stack, IEnumerable<T> source)
+        {
+            if (stack is null)
+            {
+                throw new ArgumentNullException(nameof(stack));
+            }
+
+            if (source != null)
+            {
+                foreach (var item in source)
+                {
+                    stack.Push(item);
+                }
+            }
+        }
+    }
+}